- In 2007, received Boston Society of Film Critics Award for Best Actor
- In 2007, received Tony Award for Best Performance by a Leading Actor in a Play
- In 2002, received Tony Award for Best Performance by a Featured Actor in a Play
- In 1996, received Drama Desk Award for Outstanding Actor in a Play
- In 1992, received CableACE Award for Best Actor in a Dramatic Series
- In 1975, received Drama Desk Award for Outstanding Actor in a Play
- In 1975, received Tony Award for Best Performance by a Featured Actor in a Play
- In 1970, received National Board of Review Award for Best Supporting Actor
- In 1969, received Drama Desk Award for Outstanding Actor in a Play
- In 1966, received OBIE Award for Distinguished Performance
- In 1965, received OBIE Award for Best Performance
