Stephen Dillane (born 30 November 1956) is a British Tony Award and BAFTA-winning actor.

Dillane was born in London, England to an Australian surgeon father and an English mother. He read history and political science at the University of Exeter and afterward became a journalist for the Croydon Advertiser. Unhappy in his career, he read how actor Trevor Eve gave up architecture for acting and was thus inspired to enter the Bristol Old Vic Theatre School.

Dillane is a distinguished theatre actor and his notable roles include Archer in The Beaux' Stratagem (Royal National Theatre 1989 ), Prior Walter in Angels in America (1993), Hamlet (1990), Clov in Samuel Beckett's Endgame (1996), Uncle Vanya (1998), Henry in Tom Stoppard's The Real Thing for which he won a Tony (2000) and a one-man version of Macbeth (2005).