Exhibit 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                       AS ADOPTED PURSUANT TO SECTION 906
                        OF THE SARBANES-OXLEY ACT OF 2002

     I, Jeff Shell, Chief Executive Officer of Gemstar-TV Guide International,
Inc. (the "Company"), do hereby certify, pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my
knowledge:

     (i) the annual report on Form 10-K of the Company for the year ended
     December 31, 2002, as filed with the Securities and Exchange Commission
     (the "Report"), fully complies with the requirements of Section 13(a) or
     15(d) of the Securities Exchange Act of 1934; and

     (ii) the information contained in the Report fairly presents, in all
     material respects, the financial condition and results of operations of the
     Company.

Date:  March 31, 2003

                                         /s/ Jeff Shell
                                         ----------------------------------
                                         Jeff Shell
                                         Chief Executive Officer
                                         (Principal Executive Officer)

A signed original of this written statement required by Section 906 has been
provided to the Company and will be retained by the Company and furnished to the
Securities and Exchange Commission or its staff upon request.