Christopher Ashton Kutcher (born February 7, 1978), better known as Ashton Kutcher, is an American actor, producer, former fashion model, and comedian, best known for his portrayal of Michael Kelso in the Fox sitcom That '70s Show. He also created, produced, and hosted Punk'd.and played lead roles in the Hollywood films Dude, Where's My Car?, Just Married, The Butterfly Effect, The Guardian, and What Happens in Vegas. He is also the producer and co-creator of the supernatural TV show Room 401 and the reality TV show Beauty and the Geek. It was announced in May 2011 that Kutcher would replace Charlie Sheen in the hit CBS sitcom Two and a Half Men.