Christopher Ashton Kutcher, known as Ashton Kutcher, is an American film actor, television actor, producer and former fashion model, best-known for playing Michael Kelso in the Fox sitcom That '70s Show. He created, produced and hosted Punk'd. He played lead roles in such films as Dude, Where's My Car?, Just Married, The Butterfly Effect, The Guardian and What Happens in Vegas.

Kutcher is also the producer and co-creator of the supernatural TV show Room 401 and the reality TV show Beauty and the Geek. He is married to actress Demi Moore. As of April 2009 [update], Kutcher is the most followed user on the social-networking site Twitter.