Robert John Downey Jr Born on April 4, 1965. He is an American actor. His career has included critical and popular success in his youth, followed by a period of substance abuse and legal troubles, and a resurgence of commercial success in middle age. Downey began building upon theater roles. In 1987, Downey played Julian Wells, a drug-addicted rich boy whose life rapidly spirals out of his control, in the film version of the Bret Easton Ellis novel Less Than Zero.