Filed pursuant to Rule 424(b)(3)
                                                        File No. 333-102889


PROSPECTUS SUPPLEMENT NO. 1
(To Prospectus dated May 16, 2003)


                           MAGNA ENTERTAINMENT CORP.

                                  $75,000,000
        7 1/4% Convertible Subordinated Notes due December 15, 2009 and
              Shares of Class A Subordinate Voting Stock Issuable
                       upon the Conversion of the Notes

         This prospectus supplement supplements the prospectus dated May 16,
2003 of Magna Entertainment Corp., relating to the sale from time to time by
certain of our securityholders (including their future pledgees, donees,
assignees, transferees or successors) of up to $75,000,000 aggregate principal
amount of our 7 1/4% Convertible Subordinated Notes due December 15, 2009 and
the shares of Class A Subordinate Voting Stock issuable upon conversion of the
notes. You should read this prospectus supplement in conjunction with the
prospectus, and this prospectus supplement is qualified by reference to the
prospectus, except to the extent that the information in this prospectus
supplement supersedes the information contained in the prospectus.

         The table of selling securityholders contained in the prospectus is
hereby amended to update the information for the following selling
securityholders:




                                                                                Number of Shares
                                                                                   of Class A
                                           Aggregate                              Subordinate
                                        Principal Amount                       Voting Stock That
                                       of Notes That May                       May Be Sold Under     Percentage of
                                         Be Sold Under       Percentage of      this Prospectus          Shares
                Name                    this Prospectus    Notes Outstanding          (1)           Outstanding (2)
- ------------------------------------   ------------------- ------------------  -------------------  -----------------
                                                                                                   
Credit Suisse First Boston                             $0                  0%                   0                  0%
(Europe) Limited

Credit Suisse First Boston                    $30,125,000             40.167%           3,544,117              6.787%
Europe Limited

Shepherd Investments                                   $0                  0%                   0                  0%
International, Ltd.

Stark Trading                                          $0                  0%                   0                  0%








All other holders of the notes or             $13,025,000             17.367%           1,532,352              3.052%
future transferees, pledgees,
donees, assignees or successors of
any such holders (3)




(1)      The number of shares of Class A Subordinate Stock beneficially
         owned and being offered, as set forth in the table, has been
         determined in accordance with Rule 13d-3 under the Securities
         Exchange Act, include shares of Class A Subordinate Voting Stock into
         which the notes are convertible, and assumes a conversion price of
         $8.50 per share of Class A Subordinate Voting Stock and the payment
         of cash in lieu of fractional shares. In addition, the conversion
         price of the notes may be adjusted under certain circumstances which
         will change the number of shares of Class A Subordinate Voting Stock
         received upon their conversion. See "Description of the Notes -
         Conversion of the Notes" in the prospectus.

(2)      Calculated based on Rule 13d-3(d)(i) of the Securities Exchange Act,
         using 48,674,796 shares of Class A Subordinate Voting Stock
         outstanding as of March 17, 2003. In calculating this percentage for
         each holder, we treated as outstanding the number of shares of
         Class A Subordinate Voting Stock issuable upon the conversion of all
         that holder's notes, but we did not assume conversion of any other
         holders' notes, or include any other shares of Class A Subordinate
         Voting Stock that may be held by such holder. Does not include shares
         of Class A Subordinate Voting Stock that may be issued by us upon
         redemption or purchase of the notes by us at the option of the holder.

(3)      Information concerning other selling securityholders not listed in the
         prospectus (as amended or supplemented), including current holders of
         the notes for which we have not received information regarding their
         holdings, will be included in further supplements to this prospectus,
         if required. For purposes of this table, we have assumed that any
         other holders of the notes, or any future pledgees, donees, assignees,
         transferees or successors of any other such holders of the notes, do
         not beneficially own any other shares of Class A Subordinate Voting
         Stock, other than the shares of Class A Subordinate Voting Stock
         issuable upon the conversion of the notes.

         Investing in the notes or shares of our Class A Subordinate Voting
Stock involves risks that are described in the "Risk Factors" section
beginning on page 3 of the prospectus.

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE
ADEQUACY OR ACCURACY OF THIS PROSPECTUS SUPPLEMENT, AND ANY REPRESENTATION TO
THE CONTRARY IS A CRIMINAL OFFENSE.


         The date of this prospectus supplement is October 14, 2003.