Hollywood actor James Franco and actress Anne Hathaway are reportedly set to perform a number from hit film Grease at the upcoming Oscar ceremony. Franco let out a hint about performing the track 'You're the one that I want' Sunday's gala,after posting a 19-second clip of what appears to be rehearsals for the big number on YouTube,reported Contactmusic. The two stars will team up to co-host the Academy Awards and their routine has been a closely guarded secret. But the new online footage features Franco and Hathaway,as John Travolta and Olivia Newton-John,performing the movie musical number. Meanwhile,the duo reiterated they won't make nasty jokes at anyone's expense. In an interview,Anne Hathaway said,I can guarantee that if you're looking for someone to call people out,we're not your hosts. I think that humor is really difficult to pull off,and I'm not particularly adept at it. I wouldn't feel comfortable doing it. Also,I don't mean to sound overly serious,but I am the youngest host in history and I have no business being cynical or calling anyone out. I certainly haven't earned the right to do that.