Robert John Downey, Jr. is an American actor whose 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. Making his screen debut at the age of five, appearing in his father Robert Downey, Sr.'s film Pound, he appeared in roles associated with the Brat Pack, such as the teen sci-fi comedy Weird Science and the drama Less Than Zero. Other films he has starred in include the action comedy Air America, the comedy Soapdish, and the crime film Natural Born Killers. He starred as Charlie Chaplin, the title character in the 1992 film Chaplin, which earned him a nomination for the Academy Award for Best Actor. After being released in 2000 from the California Substance Abuse Treatment Facility and State Prison where he was on drug charges, Downey joined the cast of the TV series Ally McBeal playing Calista Flockhart's love interest. His performance was praised and he received a Golden Globe Award for Best Performance by an Actor in a Supporting Role in a Series, Miniseries, or Television Film.