Sean Justin Penn is an American actor, film director and political activist. He has won two Academy Awards, for his roles in the mystery drama Mystic River and the biopic Milk.\nPenn began his acting career in television with a brief appearance in a 1974 episode of Little House on the Prairie, directed by his father Leo Penn. Following his film debut in 1981's drama Taps and a diverse range of film roles in the 1980s, including Fast Times at Ridgemont High, Penn garnered critical attention for his role in the crime drama Carlito's Way. He became known as a prominent leading actor with the 1995 drama Dead Man Walking, for which he earned his first Academy Award nomination and the Best Actor Award at the Berlin Film Festival. Penn received another two Oscar nominations for Woody Allen's comedy-drama Sweet and Lowdown and the drama I Am Sam, before winning his first Academy Award for Best Actor in 2003 for Mystic River and a second one in 2008 for Milk. He has also won a Best Actor Award of the Cannes Film Festival for the Nick Cassavetes-directed She's So Lovely, and two Best Actor Awards at the Venice Film Festival for the indie film Hurlyburly and the drama 21 Grams.