While Ashton Kutcher makes his leap to the big screen in Dude, Where's My Car? (opening Friday), his That '70s Show co-star, Topher Grace, says he wants no part of dopey teen pics.

"I'm kind of hard on teen movies," Grace tells TV Guide Online. "I don't like a lot of them, because [they're] from older executives guessing what their kids want to see. If my dad decided the kind of movie I'd want to see, I can guarantee you I wouldn't like it."

Grace — who makes his theatrical debut as a prep school drug addict in the new Michael Douglas film, Traffic (opening in New York and Los Angeles on Dec. 27, followed by a wide release on Jan. 5) — says he actually turned down several teen comedy scripts prior to taking the role in the Steven Soderbergh-directed drama.

"I remember saying to Steven that I wanted to do a one-eighty from what I am on TV," says Grace, who plays it for laughs as nerdy Eric Forman on Fox's That 70's Show. "But the real reason I took the film is because of the company I'd be working with, not the role.

"I was so worried about working with [Douglas and Soderbergh], but they were both so wonderful and funny and easygoing and made it so much fun," adds the 21-year-old. It probably helped that Douglas and Grace had a similar upbringing — both grew up in Connecticut and went to boarding schools in Massachusetts — and share the same dry sense of humor.

Still, Grace had to prepare himself for some pretty intense scenes opposite the Oscar winner. "You have not lived until Michael Douglas has yelled at you at the top of his lungs," he confesses. "I was crying, I was so freaked out."