| Yıl | Film | Rol | Notlar |
|---|---|---|---|
| 1977 | Can I Do It 'Till I Need Glasses? | ||
| 1980 | Popeye | Popeye | |
| 1982 | The World According to Garp | T.S. Garp | |
| 1983 | The Survivors | Donald Quinelle | |
| 1984 | Moscow on the Hudson | Vladimir Ivanov | |
| 1986 | Seize the Day | Tommy Wilhelm | |
| Club Paradise | Jack Moniker | ||
| The Best of Times | Jack Dundee | ||
| 1987 | Günaydın Vietnam | Adrian Cronauer | Oscar ödülü adaylığı. |
| 1988 | The Adventures of Baron Munchausen | King of the Moon | |
| Portrait of a White Marriage | Air Conditioning Salesman | Cameo | |
| 1989 | Ölü Ozanlar Derneği | John Keating | Williams Oscar adayı oldu. Film en iyi senaryo Oscar'ını aldı. |
| 1990 | Awakenings | Dr. Malcolm Sayer | |
| Cadillac Man | Joey O'Brien | ||
| 1991 | Hook (Kanca) | Peter Pan | |
| The Fisher King | Parry | ||
| Dead Again | Doktor Cozy Carlisle | ||
| 1992 | Toys | Leslie Zevo | |
| Aladdin | Genie | Seslendirme, Golden Globe ödülünü kazandı. | |
| From Time to Time (veya The Timekeeper) | Timekeeper | ||
| FernGully: The Last Rainforest | Batty Koda | Seslendirme | |
| Shakes the Clown | Pantomim Jerry | Cameo | |
| I'm From Hollywood | Belgesel | ||
| 1993 | Mrs. Doubtfire | Daniel Hillard / Bayan Doubtfire | Aynı zamanda yapımcı |
| Being Human | Hector | ||
| 1994 | In Search of Dr. Seuss | Baba | |
| 1995 | Aladdin and the King of Thieves | Genie | Seslendirme |
| Jumanji | Alan Parrish | ||
| To Wong Foo, Thanks for Everything! Julie Newmar | John Jacob Jingleheimer Schmidt | Cameo | |
| Nine Months | Dr. Kosevich | ||
| 1996 | Hamlet | Osric | |
| The Secret Agent | Profesor | ||
| Jack | Jack Powell | ||
| The Birdcage | Armand Goldman | ||
| 1997 | Good Will Hunting | Sean Maguire | En iyi yardımcı erkek oyuncu Oscarı |
| Flubber | Profesor Philip Brainard | ||
| Deconstructing Harry | Mel/Harry'nin karakteri | ||
| Fathers' Day | Dale Putley | ||
| 1998 | Patch Adams | Hunter "Patch" Adams | |
| Junket Whore | Belgesel | ||
| What Dreams May Come | Chris Nielsen | ||
| 1999 | Bicentennial Man | Andrew Martin | |
| Jakob the Liar | Jakob Heym/Narrator | Aynı zamanda yapımcı | |
| Get Bruce | Belgesel | ||
| 2001 | Yapay Zeka (film) | Dr. Bilen | Seslendirme |
| 2002 | The Rutles 2: Can't Buy Me Lunch | Cameo | |
| Insomnia | Walter Finch | ||
| Death to Smoochy | 'Rainbow' Randolph Smiley | ||
| One Hour Photo | Sy Parrish | ||
| 2004 | Noel | Charlie Boyd/The Priest | |
| House of D | Pappass | ||
| The Final Cut | Alan W. Hakman | ||
| 2005 | In Search of Ted Demme | ||
| The Big White | Paul Barnell | ||
| Robots | Fender | Seslendirme | |
| The Aristocrats | Belgesel | ||
| 2006 | |||
| Night at the Museum | Teddy Roosevelt | ||
| Man of the Year | Tom Dobbs | ||
| Happy Feet | Ramon/Lovelace | Seslendirme | |
| Everyone's Hero | Napoleon Cross | Seslendirme | |
| RV | Bob Munro | ||
| The Night Listener | Gabriel Noone | ||
| 2007 | License to Wed | Father Frank | |
| August Rush | Wizard | ||
| 2009 | Old Dogs | Lead | |
| Shrink | TBA | ||
| World's Greatest Dad | Lance Clayton | ||
| Night at the Museum: Battle of the Smithsonian | Theodore Roosevelt | ||
| 2011 | Happy Feet Two | Ramon / Lovelace | Seslendirme |
| Stage Left: A Story of Theater in the Bay Area | Kendisi | Belgesel | |
| 2013 | The Big Wedding | Father Monighan | |
| The Face of Love | Roger | ||
| The Butler | Dwight D. Eisenhower | ||
| The Zero Theorem | Street Commercial | ||
| 2014 | The Angriest Man in Brooklyn[2] | Henry Altmann | |
| Boulevard | Nolan Mack | ||
| A Friggin' Christmas Miracle | Mitch | ||
| Night at the Museum 3 | Theodore Roosevelt |
Etiketler: dead poets society, dünya ve yaşam, hollywood, kültür ve sanat, manşet, ölü ozanlar derneği, robin williams, sinema