Robert John Downey, Jr. (born April 4, 1965) is an American actor, filmmaker, and singer. Making his screen debut at the age of five, appearing in his father Robert Downey, Sr.'s film Pound, he has appeared in roles associated with the Brat Pack, such as Less Than Zero and Weird Science. Other films he has starred in include Air America, Soapdish, and 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. His character was written out when Downey was fired after two drug arrests in late 2000 and early 2001. After one last stay in a court-ordered drug treatment program, Downey finally achieved sobriety.