Ashton Kutcher

For Ashton Kutcher, the trajectory from high school football star to TV star was a short one: By the time the Iowa native hit age 20, he'd landed the role of sweetly dim Michael Kelso on "That '70s Show."

Born Feb. 7, 1978, in Cedar Rapids, Iowa, Kutcher parlayed good looks, comic chops and small-screen success into big-screen stardom with 2000's Dude, Where's My Car?, in which a pair of stoner buddies wake up after a night of partying to find their car missing. Roles in Just Married and The Butterfly Effect followed, cementing the young actor's film career.

Not content to remain solely in front of the camera, Kutcher co-created, co-produced and hosted "Punk'd," an MTV series featuring elaborate practical jokes on other celebrities, and executive-produced the reality hit "Beauty and the Geek." He returned to the big screen in What Happens in Vegas, starring opposite Cameron Diaz.