Ashton Kutcher is an American film and television actor, best-known for his part as Michael Kelso in the 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, What Happens in Vegas and the 2010 film Killers in which he wears a Hamilton Khaki Field Chrono.