Filed pursuant to Rule 424(b)(3)
                                                     Registration No. 333-106293


                           PROSPECTUS SUPPLEMENT NO. 4
                       (TO PROSPECTUS DATED JULY 3, 2003)

                                U.S. $889,000,000

                              CARNIVAL CORPORATION

                     SENIOR CONVERTIBLE DEBENTURES DUE 2033
                         GUARANTEED BY CARNIVAL PLC AND
                   P&O PRINCESS CRUISES INTERNATIONAL LIMITED

         This prospectus supplement No. 4 supplements and amends the prospectus
dated July 3, 2003, as amended and supplemented by prospectus supplement No. 1
dated July 21, 2003, prospectus supplement No. 2 dated August 8, 2003 and
prospectus supplement No. 3 dated August 25, 2003 relating to $889,000,000
aggregate principal amount at maturity of our Senior Convertible Debentures due
2033 (the "debentures") and 20,896,657 shares of our common stock issuable upon
conversion of the debentures held by the selling securityholders, plus an
indeterminate number of shares as may become issuable upon conversion of the
debentures by reason of adjustment to the conversion price.

         The table on page 74 of the prospectus sets forth information with
respect to the selling securityholders and the respective amounts at maturity of
debentures beneficially owned by each selling securityholder that may be offered
pursuant to the prospectus, as amended and supplemented by prospectus supplement
No. 1 dated July 21, 2003, prospectus supplement No. 2 dated August 8, 2003 and
prospectus supplement No. 3 dated August 25, 2003. This prospectus supplement
amends that table by adding to it the items set forth below.



- ------------------------------------------------------------------------------------------------------------------------
                                       PRINCIPAL AMOUNT                     NUMBER OF SHARES OF
                                        AT MATURITY OF       PERCENT OF         COMMON STOCK       NUMBER OF SHARES OF
                                          DEBENTURES           TOTAL           ISSUABLE UPON       COMMON STOCK OWNED
            SELLING                      BENEFICIALLY       OUTSTANDING      INITIAL CONVERSION    PRIOR TO CONVERSION
        SECURITYHOLDER                OWNED AND OFFERED      DEBENTURES      OF DEBENTURES (1)      OF DEBENTURES (1)
- ------------------------------------------------------------------------------------------------------------------------
                                                                                       

Banc of America Securities L.L.C....        $2,100,000             0.24%            49,362                   0
- ------------------------------------------------------------------------------------------------------------------------

Bear, Stearns & Co., Inc............       $30,500,000             3.43%           716,927                   0
- ------------------------------------------------------------------------------------------------------------------------

Laurel Ridge Capital, LP............        $7,500,000             0.84%           176,294                   0
- ------------------------------------------------------------------------------------------------------------------------

White River Securities L.L.C........       $30,500,000             3.43%           716,927                   0
- ------------------------------------------------------------------------------------------------------------------------


(1)  Also includes an equivalent number of non-detachable trust shares of
     beneficial interest in P&O Princess Special Voting Trust, a trust
     established under the laws of the Cayman Islands. See "Description of Trust
     Shares."

The prospectus dated July 3, 2003, as amended and supplemented by prospectus supplement No. 1 dated July 21, 2003, prospectus supplement No. 2 dated August 8, 2003, prospectus supplement No. 3 dated August 25, 2003 and this prospectus supplement No. 4 constitutes the prospectus required to be delivered by Section 5(b) of the Securities Act of 1933, as amended, with respect to offers and sales of the debentures and the common stock issuable upon conversion of the debentures. Our common stock is traded on the New York Stock Exchange under the symbol "CCL." On September 10, 2003, the last reported sales price of the common stock was $33.41 per share. There is no public market for the debentures, and we do not intend to apply for their listing on any securities exchange or seek approval for quotation of them through any automated system. INVESTING IN THE SECURITIES OFFER BY THIS PROSPECTUS INVOLVES RISKS THAT ARE DESCRIBED IN THE "RISK FACTORS" SECTION BEGINNING ON PAGE 11 OF THE ACCOMPANYING PROSPECTUS. Neither the Securities and Exchange Commission, nor any state securities commission has approved or disapproved of the securities offered by this prospectus or passed upon the adequacy or accuracy of this prospectus supplement. Any representation to the contrary is a criminal offense. ----------------------------- The date of this prospectus supplement is September 11, 2003.

SELLING SECURITYHOLDERS The prospectus dated July 3, 2003, as amended and supplemented by prospectus supplement No. 1 dated July 21, 2003, prospectus supplement No. 2 dated August 8, 2003, and prospectus supplement No. 3 dated August 25, 2003 relating to the offer for resale of $889,000,000 aggregate principal amount at maturity of debentures and 20,896,657 shares of our common stock issuable upon conversion of the debentures held by the selling securityholders, plus an indeterminate number of shares as may become issuable upon conversion of the debentures by reason of adjustment to the conversion price and, upon each issuance of shares of Carnival Corporation common stock to a person, including to a holder of debentures upon conversion of debentures, an equivalent number of non-detachable trust shares of beneficial interest in the P&O Princess Special Voting Trust, is amended to replace the first paragraph and the table under the heading "Selling Securityholders" on page 74 with the information in the following paragraph and table. We may further amend or supplement this table from time to time if necessary. We originally sold the debentures to the initial purchaser in a private placement. The debentures were subsequently resold by the initial purchaser to purchasers, including the selling securityholders listed below, in transactions exempt from registration. The following table provides, as of September 11, 2003, the principal amount at maturity of debentures held by such selling securityholder, the number of shares of common stock beneficially owned by such securityholder prior to its conversion of any debentures and the number of shares of our common stock issuable upon conversion of the debentures. This information has been obtained from the selling securityholders. - ------------------------------------------------------------------------------------------------------------------------ PRINCIPAL AMOUNT NUMBER OF SHARES OF AT MATURITY OF PERCENT OF COMMON STOCK NUMBER OF SHARES OF DEBENTURES TOTAL ISSUABLE UPON COMMON STOCK OWNED SELLING BENEFICIALLY OUTSTANDING INITIAL CONVERSION PRIOR TO CONVERSION SECURITYHOLDER OWNED AND OFFERED DEBENTURES OF DEBENTURES (1) OF DEBENTURES (1) - ------------------------------------------------------------------------------------------------------------------------ Argent Classic Convertible Arbitrage (Bermuda) Fund Ltd...... $6,600,000 0.74% 155,138 0 - ------------------------------------------------------------------------------------------------------------------------ Argent Classic Convertible Arbitrage Fund L.P................ $2,800,000 0.31% 65,816 0 - ------------------------------------------------------------------------------------------------------------------------ Argent LowLev Convertible Arbitrage Fund LLC................ $1,100,000 0.12% 25,856 0 - ------------------------------------------------------------------------------------------------------------------------ Argent LowLev Convertible Arbitrage Fund Ltd................ $6,300,000 0.71% 148,087 0 - ------------------------------------------------------------------------------------------------------------------------ Banc of America Securities L.L.C.. $2,100,000 0.24% 49,362 0 - ------------------------------------------------------------------------------------------------------------------------ Bank Austria Cayman Islands, LTD.. $7,650,000 0.86% 179,819 0 - ------------------------------------------------------------------------------------------------------------------------ Bear, Stearns & Co., Inc.......... $30,500,000 3.43% 716,927 0 - ------------------------------------------------------------------------------------------------------------------------ BNP Paribas Equity Strategies SNC............................... $744,000 0.08% 17,488 0 - ------------------------------------------------------------------------------------------------------------------------ Clinton Convertible Managed Trading Account 1 Limited......... $2,620,000 0.29% 61,585 0 - ------------------------------------------------------------------------------------------------------------------------ Clinton Multistrategy Master Fund, Ltd......................... $21,890,000 2.46% 514,542 0 - ------------------------------------------------------------------------------------------------------------------------ Clinton Riverside Convertible Portfolio Limited................. $22,000,000 2.47% 517,128 0 - ------------------------------------------------------------------------------------------------------------------------ Continental Assurance Company On Behalf Of Its Separate Account (E)...................... $3,100,000 0.35% 72,868 0 - ------------------------------------------------------------------------------------------------------------------------ Continental Casualty Company...... $24,400,000 2.74% 573,542 0 - ------------------------------------------------------------------------------------------------------------------------ CooperNeff Convertible Strategies (Cayman) Master Fund L.P.......................... $580,000 0.07% 13,633 0 - ------------------------------------------------------------------------------------------------------------------------ DBAG London....................... $500,000 .06% 11,753 0 - ------------------------------------------------------------------------------------------------------------------------ Global Bermuda Limited Partnership....................... $23,100,000 2.60% 542,984 0 - ------------------------------------------------------------------------------------------------------------------------ Goldman, Sachs & Co............... $48,400,000 5.44% 1,137,681 0 - ------------------------------------------------------------------------------------------------------------------------ Guggenheim Portfolio Co. XV, LLC.. $1,350,000 0.15% 31,733 0 - ------------------------------------------------------------------------------------------------------------------------ Hamilton Multi-Strategy Master Fund, LP.......................... $4,300,000 0.48% 101,075 0 - ------------------------------------------------------------------------------------------------------------------------ Highbridge International LLC...... $50,000,000 5.62% 1,175,290 0 - ------------------------------------------------------------------------------------------------------------------------ KBC Financial Products (Cayman Islands) Ltd...................... $5,500,000 0.62% 129,282 0 - ------------------------------------------------------------------------------------------------------------------------ KBC Financial Products USA Inc.... $1,450,000 0.16% 34,083 0 - ------------------------------------------------------------------------------------------------------------------------ Lakeshore International, Ltd...... $92,400,000 10.40% 2,171,936 0 - ------------------------------------------------------------------------------------------------------------------------ Laurel Ridge Capital, LP.......... $7,500,000 0.84% 176,294 0 - ------------------------------------------------------------------------------------------------------------------------ Lyxor Master Fund................. $2,100,000 0.24% 49,362 0 - ------------------------------------------------------------------------------------------------------------------------ Meadow IAM Limited ............... $2,090,000 0.24% 49,127 0 - ------------------------------------------------------------------------------------------------------------------------ Merrill, Lynch, Pierce, Fenner & Smith, Inc...................... $92,750,000 10.43% 2,180,163 0 - ------------------------------------------------------------------------------------------------------------------------ Nomura Securities International, Inc................ $15,000,000 1.69% 352,587 658,452 - ------------------------------------------------------------------------------------------------------------------------ Ramius Capital Group.............. $900,000 0.10% 21,155 0 - ------------------------------------------------------------------------------------------------------------------------ Ramius, LP........................ $270,000 0.03% 6,347 0 - ------------------------------------------------------------------------------------------------------------------------ Ramius Master Fund, LTD........... $10,823,000 1.22% 254,403 0 - ------------------------------------------------------------------------------------------------------------------------ Ramius Partners II, LP............ $315,000 0.04% 7,404 0 - ------------------------------------------------------------------------------------------------------------------------ RCG Baldwin, LP................... $1,125,000 0.13% 26,444 0 - ------------------------------------------------------------------------------------------------------------------------ RCG Halifax Master Fund, LTD...... $1,125,000 0.13% 26,444 0 - ------------------------------------------------------------------------------------------------------------------------ RCG Latitude Master Fund, LTD..... $10,822,000 1.22% 254,380 0 - ------------------------------------------------------------------------------------------------------------------------ RCG Multi Strategy Master Fund, LTD......................... $720,000 0.08% 16,924 0 - ------------------------------------------------------------------------------------------------------------------------ S.A.C. Capital Associates, LLC............................... $500,000 0.06% 11,753 7,500 - ------------------------------------------------------------------------------------------------------------------------ Sagamore Hill Hub Fund LTD........ $35,600,000 4.00% 836,806 0 - ------------------------------------------------------------------------------------------------------------------------ Singlehedge US Convertible Arbitrage Fund ................... $71,000 0.01% 1,669 0 - ------------------------------------------------------------------------------------------------------------------------ Sturgeon Limited.................. $105,000 0.01% 2,468 0 - ------------------------------------------------------------------------------------------------------------------------ Swiss Re Financial Products Corporation....................... $47,000,000 5.29% 1,104,773 0 - ------------------------------------------------------------------------------------------------------------------------ The Coast Fund, LP................ $21,100,000 2.37% 495,972 0 - ------------------------------------------------------------------------------------------------------------------------ UBS AG London Branch.............. $115,000,000 12.94% 2,703,167 0 - ------------------------------------------------------------------------------------------------------------------------ White River Securities L.L.C...... $30,500,000 3.43% 716,927 0 - ------------------------------------------------------------------------------------------------------------------------ Xavex Convertible Arbitrage #5.... $900,000 0.10% 21,155 0 - ------------------------------------------------------------------------------------------------------------------------ Xavex Risk Arbitrage Fund 2....... $400,000 0.04% 9,402 0 - ------------------------------------------------------------------------------------------------------------------------ Zurich Institutional Benchmark Master Fund LTD................... $300,000 0.03% 7,052 0 - ------------------------------------------------------------------------------------------------------------------------ (1) Also includes an equivalent number of non-detachable trust shares of beneficial interest in P&O Princess Special Voting Trust, a trust established under the laws of the Cayman Islands. See "Description of Trust Shares."