After participating as a modelling contestant in an IMTA competition (losing to Josh Duhamel) in 1997, Kutcher signed with the Next modeling agency in New York, appeared in ads for Calvin Klein, modeled in Paris and Milan, and appeared in a Pizza Hut commercial.

After some success in modeling, Kutcher moved to Los Angeles and, after his first audition, was cast as Michael Kelso in the television series That '70s Show, which debuted in 1998 and ended in 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), he starred in several comedy films that performed well at the box office, including Dude, Where's My Car? (2000), Just Married (2003), and Guess Who (2005). In addition, he appeared in the family film Cheaper By The Dozen, playing a self-obsessed actor. His 2004 film The Butterfly Effect was an unusually dramatic role for Kutcher, playing a conflicted young man who fell in love with a gir