Jim Carrey
Before Jim Carrey became a Liar, Liar and put on The Mask, the 15-year-old dropout who would become The Cable Guy took his first stand-up stage in Toronto. The factory janitor worked his way up to opening for Buddy Hackett and Rodney Dangerfield before heading west in 1983 and landing TV movie Introducing … Janet. A year later he made his film debut in Finders Keepers and appeared in the likes of Once Bitten and Peggy Sue Got Married, but the In Living Color regular didn't make it big until he played the titular role in Ace Ventura: Pet Detective
