TV funnyman Ricky Gervais has won over John Travolta and convinced him to appear in the Christmas special edition of his show EXTRAS. The Hollywood star had dismissed the idea of appearing as himself in the final episode of the show, due to hit screens at the end of the year (07), claiming his busy schedule - preparing for new movie Dallas - meant he wouldn't have time. But Gervais succeeded in charming him when they both appeared on British talk show FRIDAY NIGHT WITH JONATHAN ROSS - which aired last night (30MAR07). Travolta conceded, "I'll probably do anything Ricky says." The pair sealed the deal by treating viewers to a dance duet - Gervais performing his David Brent dance from The Office and Travolta showing off some of his Saturday Night Fever moves.