| Year Title Role Notes | |
| 1979 Hamlet Hamlet - | |
| 1980 The Suicide Semyon Semyonovich Podsekalnikov Nominated—Drama Desk Award for Outstanding Actor in a Play | |
| 1982–1985 Much Ado About Nothing Signior Benedick of Padua Tony Award for Best Actor in a Play Nominated—Drama Desk Award for Outstanding Actor in a Play | |
| 1983–1985 Cyrano de Bergerac Cyrano de Bergerac Critics Circle Theatre Award Best Actor Laurence Olivier Award for Actor of the Year in a Revival Nominated—Drama Desk Award for Outstanding Actor in a Play | |
| 1986–1988 Breaking the Code Alan Turing Nominated—Drama Desk Award for Outstanding Actor in a Play Nominated—Laurence Olivier Award for Best Actor Nominated—Tony Award for Best Actor in a Play | |
| 2000 Uncle Vanya Ivan Petrovich Voinitsky Nominated—Drama Desk Award for Outstanding Actor in a Play | |
| 2009 Twelfth Night Malvolio Laurence Olivier Award for Best Actor | |
| 2010 King Lear King Lear - | |
| 2016 Romeo and Juliet Mercutio - | |