Ashton Kutcher is an American actor, model, investor and producer. He majored in biochemical engineering at the University of Iowa before dropping out to pursue modeling in New York. He signed with Next modeling agency in 1998 and worked briefly as both a runway model and a print model for Calvin Klein. That same year, he moved to Los Angeles and won the role of Michael Kelso on the FOX sitcom That '70s Show. Kutcher stayed on That '70s show for the entire series run, until the year 2006. Kutcher appeared only as a guest star in the final season. Kutcher supplemented his TV career with roles in films such as Dude, Where's My Car?, The Butterfly Effect, and Just Married.