Born in 1965, the American actor has had his share of ups and downs. After an Academy Award nomination for his role in 1992's Chaplin, he wrestled for years with drug addiction, even going to jail several times for drug-related offenses. He staged a career comeback in the mid-2000's, and is currently living drug-free and stable, married to producer Susan Levin.

Robert Downey, Jr. sports several tattoos, including the words "Suzie Q." on his left bicep. Whether this is a reference to his wife, or the Hostess snack treat, remains a delicious mystery.