Peter Firth (born 27 October, 1953) is an award-winning English actor.

He is well known for a variety of starring roles in film and on television from the 1970s to the 2000s.

Peter Firth was born in Bradford, Yorkshire, in 1953. His parents owned a pub and he attended local grammar school. Firth took weekend classes at the Bradford Playhouse near his Pudsey home and by his mid-teens was playing in "Camelot" at the Bradford Alhambra. Leaving school at 16, he became a major child star in television series such as The Double Deckers, which was shot at a number of film studios in the UK. He made his film debut at the age of 18 in Franco Zeffirelli's Fratello sole, sorella luna (1972). In July 1973 he received his big break by winning the leading role of disturbed adolescent Alan Strang in Peter Shaffer's play "Equus," which was performed by the National Theatre at the Old Vic in London. In October 1974, the play opened on Broadway to sensational reviews, with Firth playing opposite Anthony Hopkins as the middle-aged Dr. Martin Dysart. Firth returned to the play at the Plymouth Theater on Broadway with Richard Burton (I) as Dysart, and then starred in several other plays by the National Theatre including versions of "Romeo and Juliet" (as Romeo) and "Spring Awakening." After taking leading roles in several films such as Aces High (1976) and Joseph Andrews (1977), Firth reprized the role of Alan Starng in the movie version of Equus (1977), directed by Sidney Lumet and again co-starring with Burton. Receiving a Bafta Award and an Academy Award nomination, Firth next played Angel Clare in Roman Polanski's Tess (1979). In 1981, he replaced Simon Callow as Wolfgang Amadeus Mozart in Peter Shaffer's play "Amadeus" on Broadway, co-starring with Sir Ian McKellen. He gave other notable performances as a Russian sailor in the kitchen sink drama Letter to Brezhnev (1985), Hunt for Red October, The (1990), Shadowlands (1993) and as a sinister theater manager in Awfully Big Adventure, An (1995) with Hugh Grant (I). In 1994, he returned to British television with a major role in the hugely popular series "Heartbeat" (1992). He is married with four children and is good friends with his Equus (1977) co-star Jenny Agutter, who also starred with him in "Spooks" (2002). He has continued to appear in major movies, including Amistad (1997) and Pearl Harbor (2001).