Incredibly Smart Celebs Who Played Really Dumb Characters

3. Ken Jeong

Ken Jeong is known for playing the insane and ridiculous Leslie Chow in the Hangover trilogy. In real life he is a doctor. He did his residency and worked as a doctor by day and did stand up at night. It was then he got the role of Dr. Kuni in Knocked Up. The role made him famous enough to quit his day job as a doctor and focus entirely on acting.