Watch out, Hollywood -- Ashton Kutcher is still out to punk you, this time on the big screen. The host and co-creator of the MTV prank series "Punk'd" says he's planning "Punk'd: the Movie."

"I might take it to another level," Ashton told Ryan Seacrest when he appeared on Ryan's KIIS-FM radio show in L.A. to promote "What Happens in Vegas," his new rom-com with Cameron Diaz. But Ashton, 30 -- also the producer of E!'s "Pop Fiction" and co-creator of "Beauty and the Geek" -- hasn't abandoned TV. He's working with Tyra Banks to develop a show that will search "for the most beautiful person in the world," and he invites candidates to post their photos on his blog.

Movie-wise, Ashton will star opposite Michelle Pfeiffer in "Personal Effects" and play a womanizer in the comedy "Spread." Though he's happily married to Demi Moore, he has no plans to act with her in a film. "So much is made of our personal life in the press," he told Ryan. "I think people would have a hard time disconnecting from the fact that we're together, married, in love ... and so, they would have a hard time believing our characters."

Who would you like to see Ashton punk next?