Christopher Ashton Kutcher (/ˈkʊtʃər/) (born February 7, 1978) is an American actor, investor, producer, and former model. He is known for his portrayal of Michael Kelso in the FoxsitcomThat '70s Show. He also created, produced, and hosted Punk'd and had lead roles in the Hollywood films Jobs, Dude, Where's My Car?, Just Married, The Butterfly Effect, The Guardian, and What Happens in Vegas. Kutcher currently stars as Walden Schmidt on the CBS sitcom Two and a Half Men, since Charlie Sheen's firing from the show in 2011.

Modelling career
After participating in an IMTA competition (losing to Josh Duhamel) in 1998, Kutcher signed with Next modeling agency in New York, appeared in ads for Calvin Klein, and modeled in Paris and Milan.

Television and film career
After his success in modeling, Kutcher moved to Los Angeles after his first audition, was cast as Michael Kelso in the television series That '70s Show, from 1998 and to 2006. Kutcher was cast in a series of film roles; although he auditioned but was not cast for the role of Danny Walker in Pearl Harbor (2001) (the role went to Josh Hartnett), he starred in several comedy films, including Dude, Where's My Car? (2000), Just Married (2003), and Guess Who (2005). He appeared in the 2003 family film, Cheaper By The Dozen, playing a self-obsessed actor. His 2004 film The Butterfly Effect was a dramatic role for Kutcher, playing a conflicted young man who time travels; the film received mixed to negative reviews, but was a box office success.