Robert Downey Jr.
When he joined SNL
's cast in 1985 at the age of 20, Robert Downey Jr. was already a movie star, having appeared in some of his filmmaker father's movies and Brat Pack comedies. In the 1990s and early 2000s, Robert was known as much for his downward spiral of drug addiction, a prison sentence and multiple rehab stints as his acclaimed acting. But by 2004, Robert was clean and sober
, and appeared on The Oprah Show
to talk about his substance abuse recovery and marriage, promote his album The Futurist
and reveal his devotion to the practice of Wing Chun Kung Fu.