Year	Title	Role	Notes
1995	The Tempest	Prospero	For the New York Shakespeare Festival, with the production later transferring to Broadway
1997	Othello	Othello	The Shakespeare Theatre Company's (Washington, D.C.) "photo negative" production of a white Othello with an otherwise all-black cast
2000	The Ride Down Mt. Morgan	Lyman Felt	On 9 April 2000, Stewart opened in Arthur Miller's The Ride Down Mt. Morgan at the Broadway Ambassador Theatre.
2001	Who's Afraid of Virginia Woolf?	George	Edward Albee's play at the Guthrie in Minneapolis
2001	Johnson Over Jordan	Robert Johnson	J.B. Priestley's play at the West Yorkshire Playhouse in Leeds
2003	The Master Builder	Halvard Solness	Henrik Ibsen's play at the Albery Theatre, London
2003	The Caretaker	Davies	Harold Pinter's play in Broadway's American Airlines Theatre
2006	The Tempest	Prospero	At the Royal Shakespeare Theatre and then the Novello Theatre
2006	Antony and Cleopatra	Mark Antony	At the Swan Theatre, for the Royal Shakespeare Company as part of the cycle performing all Shakespeare's works in a year
2007	A Christmas Carol	All	By Charles Dickens. Played 40 roles in a one-man performance at the Albery Theatre in the West End of London.
2007	Twelfth Night	Malvolio	At Chichester Festival Theatre's 2007 summer festival with a Scottish accent and kilt in Philip Franks' main house staging
2007	Macbeth	Macbeth	In Rupert Goold's revival in the Minerva studio theatre. The Chichester production of Macbeth transferred to the Gielgud Theatre in London's Shaftesbury Avenue.
2008	Macbeth	Macbeth	At the Brooklyn Academy of Music in New York City
2008	Macbeth	Macbeth	At the Lyceum Theatre, New York
2008	Hamlet	Claudius and the Ghost	Alongside David Tennant as the eponymous Hamlet with the Royal Shakespeare Company in Stratford-upon-Avon. This was later made into a television play and broadcast on BBC1 on 26 December 2009.
2009	Waiting for Godot	Vladimir (Didi)	Alongside Ian McKellen as Estragon (Gogo)
2010	Bingo: Scenes of Money and Death	William Shakespeare	By Edward Bond at the Chichester Festival Theatre, transferring to the Young Vic Theatre in February 2012. This was a role he had first performed in 1976 at The Other Place, Stratford.
2011	The Merchant of Venice	Shylock	In Rupert Goold's production