Filmography70 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2025 | The American RevolutionSeries | Benjamin Franklin (voice) | 73 |
| 2025 | Rob Reiner – Scenes from a LifeMovie | Self | 73 |
| 2025 | Good Hang with Amy PoehlerSeries | Self - Guest | 73 |
| 2025 | Harry Chapin - Cat’s in the Cradle: The Song That Changed Our LivesMovie | Self | 73 |
| 2024 | Death and Other DetailsSeries | Rufus Cotesworth | 72 |
| 2024 | Brilliant MindsSeries | Dr. Noah Wolf | 72 |
| 2023 | The Magician's ElephantMovie | Vilna Lutz (voice) | 71 |
| 2020 | DisclosureMovie | Avigdor (archive footage) | 68 |
| 2019 | On BroadwayMovie | Self (archive footage) | 67 |
| 2018 | Harold Prince: The Director's LifeMovie | — | 66 |
| 2017 | WonderMovie | Mr. Tushman | 65 |
| 2017 | The Good FightSeries | Hal Wackner | 65 |
| 2017 | Smurfs: The Lost VillageMovie | Papa Smurf (voice) | 65 |
| 2016 | The Queen of SpainMovie | Jordan Berman | 64 |
| 2016 | Best Worst Thing That Ever Could Have Happened...Movie | Self | 64 |
| 2016 | Cholesterol: The Great BluffMovie | Self - TV Spot Announcer (archive footage) | 64 |
| 2015 | The Late Show with Stephen ColbertSeries | Self | 63 |
| 2014 | Late Night with Seth MeyersSeries | Self | 62 |
| 2014 | Wish I Was HereMovie | Gabe | 62 |
| 2013 | Six by SondheimMovie | Self (archive footage) | 61 |
| 2011 | HomelandSeries | Saul Berenson | 59 |
| 2011 | Jock the Hero DogMovie | Basil (voice) | 59 |
| 2010 | Sondheim! The Birthday ConcertMovie | Self | 58 |
| 2010 | 4.3.2.1Movie | Sir Jago Larofsky | 58 |
| 2006 | Everyone's HeroMovie | Stanley Irving (voice) | 54 |
| 2006 | Choking ManMovie | Rick | 54 |
| 2005 | Criminal MindsSeries | Jason Gideon | 53 |
| 2005 | The Colbert ReportSeries | Self (uncredited) | 53 |
| 2005 | The Reichen ShowSeries | Self - Guest | 53 |
| 2003 | Dead Like MeSeries | Rube Sofer | 51 |
| 2003 | Broadway's Lost TreasuresMovie | Che (segment "Evita") | 51 |
| 2001 | PiñeroMovie | Joseph Papp | 49 |
| 2001 | As You Wish: The Story of 'The Princess Bride'Movie | Self | 49 |
| 2000 | Boston PublicSeries | Isaac Rice | 48 |
| 1999 | Strange JusticeMovie | Kenneth Duberstein | 47 |
| 1999 | The Adventures of Elmo in GrouchlandMovie | Huxley | 47 |
| 1998 | HerculesSeries | Hippocrates (voice) | 46 |
| 1998 | Lulu on the BridgeMovie | Philip Kleinman | 46 |
| 1997 | The ViewSeries | Self | 45 |
| 1997 | The HunchbackMovie | Quasimodo | 45 |
| 1996 | The Rosie O'Donnell ShowSeries | Self - Guest | 44 |
| 1995 | Some Enchanted Evening: Celebrating Oscar Hammerstein IIMovie | Self | 43 |
| 1994 | Touched by an AngelSeries | The Driver / Satan | 42 |
| 1994 | Chicago HopeSeries | Jeffrey Geiger | 42 |
| 1994 | Squanto: A Warrior's TaleMovie | Brother Daniel | 42 |
| 1992 | The Larry Sanders ShowSeries | Mandy Patinkin | 40 |
| 1992 | Picket FencesSeries | Dr. Jeffrey Geiger | 40 |
| 1991 | PerformanceSeries | Dr. Harry Hyman | 39 |
| 1991 | True ColorsMovie | John Palmeri | 39 |
| 1991 | Madonna: Truth or DareMovie | Self | 39 |
| 1990 | Law & OrderSeries | Levi March / Glenn Fordyce | 38 |
| 1990 | Dick TracyMovie | 88 Keys | 38 |
| 1989 | The SimpsonsSeries | Hugh St. John Alastair Parkfield (voice) | 37 |
| 1988 | American ExperienceSeries | Narrator (voice) | 36 |
| 1988 | LIVE with Kelly and MarkSeries | Self | 36 |
| 1988 | The House on Carroll StreetMovie | Salwen | 36 |
| 1988 | Alien NationMovie | Samuel 'George' Francisco | 36 |
| 1987 | The Princess BrideMovie | Inigo Montoya | 35 |
| 1986 | Follies: In ConcertMovie | Buddy Plummer | 34 |
| 1986 | Sondheim on Broadway: Follies - Four Days in New YorkMovie | Self | 34 |
| 1986 | Sunday in the Park with GeorgeMovie | Georges Seurat / George | 34 |
| 1985 | MaxieMovie | Nick | 33 |
| 1983 | DanielMovie | Paul Isaacson | 31 |
| 1981 | RagtimeMovie | Tateh | 29 |
| 1980 | Night of the JugglerMovie | Allesandro the Cabbie | 28 |
| 1979 | Last EmbraceMovie | First Commuter | 27 |
| 1979 | CharlestonMovie | Beaudine Croft | 27 |
| 1978 | TaxiSeries | Alan | 26 |
| 1978 | The Big FixMovie | Pool Man | 26 |
| 1971 | Great PerformancesSeries | Buddy Plummer | 19 |