Patrick George Magee (né McGee, 31 March 1922 – 14 August 1982) was an Irish actor. He was noted for his collaborations with playwrights Samuel Beckett and Harold Pinter, sometimes called "Beckett's favourite actor," as well as creating the role of the Marquis de Sade in the original stage and screen productions of Marat/Sade.

Known for his distinctive voice, he also appeared in numerous horror films and in two Stanley Kubrick films – A Clockwork Orange (1971) and Barry Lyndon (1975) – and three Joseph Losey films – The Criminal (1960), The Servant (1963) and Galileo (1975). He was a member of the Royal Shakespeare Company from 1964 to 1970.

Critic Antonia Quirke posthumously described him as "a presence so full of strangeness and charisma and difference and power," while scholar Conor Carville wrote that Magee was an "avant-garde bad-boy" and "very important and unjustly forgotten figure who represents an important aspect of the cultural ferment of the 1960s and 1970s in Britain."

McGee (he changed the spelling of his surname to Magee when he began performing, most likely to avoid confusion with another actor) was born into a middle-class Catholic family at 2 Edward Street, Armagh, County Armagh. The eldest of five children, he was educated at St. Patrick's Grammar School.

His first stage experience in Ireland was with Anew McMaster's touring company, performing the works of Shakespeare. It was here that he first worked with Pinter. He was then brought to London by Tyrone Guthrie for a series of Irish plays. He met Beckett in 1957 and soon recorded passages from the novel, Molloy, and the short story, From an Abandoned Work, for BBC radio. Impressed by "the cracked quality of Magee's distinctly Irish voice," Beckett requested copies of the tapes and wrote Krapp's Last Tape especially for the actor. First produced at the Royal Court Theatre in London on 28 October 1958, the play starred Magee directed by Donald McWhinnie. A televised version with Magee directed by McWhinnie was later broadcast by BBC2 on 29 November 1972. Beckett's biographer Anthony Cronin wrote that "there was a sense in which, as an actor, he had been waiting for Beckett as Beckett had been waiting for him."

In 1964, he joined the Royal Shakespeare Company, after Pinter, directing his own play The Birthday Party, specifically requested him for the role of McCann, and stated he was the strongest in the cast. In 1965 he portrayed the Marquis de Sade in Peter Brook's production of Peter Weiss' Marat/Sade, and when the play transferred to Broadway he won a Tony Award for Best Featured Actor in a Play. He also appeared in the 1966 RSC production of Staircase opposite Paul Scofield. In 1969, he played Inspector Hawkins in the RSC's original production of Dutch Uncle. His last play with the company was Battle of Shrivings in 1970, at the Lyric Theatre, under the direction of Peter Hall.

In 1970, he played Daniel Webster in Scratch, a Broadway adaptation of The Devil and Daniel Webster by Archibald MacLean.

Early film roles included Joseph Losey's The Criminal (1960) Dementia 13 (1963) and The Servant (1963), the latter an adaptation scripted by Pinter. He also appeared as Surgeon-Major Reynolds in Zulu (1964), Séance on a Wet Afternoon (1964), Anzio (1968), and in the film versions of Marat/Sade (1967; as de Sade) and The Birthday Party (1968). He is perhaps best known for his role as the victimised writer Frank Alexander, who tortures Alex DeLarge with Beethoven's music, in Stanley Kubrick's film A Clockwork Orange (1971). His other role for Kubrick was as Redmond Barry's mentor, the Chevalier de Balibari, in Barry Lyndon (1975). He reprised his role as the Marquis de Sade in the 1966 film adaptation of Marat/Sade, also directed by Peter Brook.