| # | Fact |
|---|
| 1 | He plays the father of the murder victim in Castle: Flowers for Your Grave (2009), the series premiere of Castle (2009). The series later paid homage to 2001: A Space Odyssey (1968), the film for which he is most famous, in Castle: The Wrong Stuff (2015). |
| 2 | He was considered for the role of Tom Hagen in The Godfather (1972) before Robert Duvall was cast. |
| 3 | Apt. New York & Home in Conn. |
| 4 | Appearing in NYC at the Vineyard Theater as "The Narrator" in "Mary Rose" a play by J.M. Barrie. [February 2007] |
| 5 | Along with Douglas Rain, he is one of only two actors to appear in both 2001: A Space Odyssey (1968) and 2010 (1984). |
| 6 | He was portrayed by actor Jim Parrack in the biopic of Sal Mineo titled Sal (2011), directed by James Franco. Dullea and Mineo were in rehearsal for the play, "P.S. Your Cat is Dead", shortly before Mineo was murdered in 1976. |
| 7 | One of the last people to see Sal Mineo alive. They had just finished rehearsing for a play, sometime before Mineo's murder. |
| 8 | Ex-wife Susan Lessans is married to former pro football great Don Meredith. |
| 9 | Both his parents have appeared in his movies. Father Robert Dullea appeared as the aged Marquis De Sade in the final scene of De Sade (1969). This was an add-on scene to the film: Keir didn't want to go through the old-age makeup, so he suggested they hire his father for the scene. This was done, Robert Dullea went to Germany, did the scene, and according to Keir, enjoyed the whole experience. Mother Margaret Ruttain Dullea appeared in a non-speaking role in David and Lisa (1962). She was going up a flight of stairs in the background of a scene between Keir and Janet Margolin. |
| 10 | Best known as Dave Bowman in 2001: A Space Odyssey (1968), a role he revisited in 2010 (1984). He didn't even have to audition for the role. After his performance in Bunny Lake Is Missing (1965), Stanley Kubrick simply asked him if he would play the role and Kier said yes. |
| 11 | Rumor had it that Paramount's planned production of "Dear and Glorious Physician" would star Keir Dullea in the lead role of St. Luke, but the cost of such a movie, coupled with fears that the Biblical "epic" had gone out of style, prompted Paramount to abandon the project in the mid-1960s. |
| 12 | In 1983, Keir Dullea, with then wife Susie Fuller Dullea, founded the Theater Artists Workshop of Westport. |
| Title | Year | Status | Character |
|---|
| April Flowers | 2017 | completed | Mr. X |
| Valley of the Gods | 2017 | post-production | Ulim |
| The Path | 2016-2017 | TV Series | Dr. Steven Meyer |
| Space Station 76 | 2014 | | Mr. Marlowe |
| Infinitely Polar Bear | 2014 | | Murray Stuart |
| Isn't It Delicious | 2013 | | Bill Weldon |
| HENRi | 2012 | Short | Henri (voice) |
| Damages | 2011 | TV Series | Julius |
| Immersive Cocoon 2011 | 2011 | Short | Unnamed |
| Castle | 2009 | TV Series | Jonathan Tisdale |
| All Me, All the Time | 2009 | | Jake |
| Fortune | 2009 | | Jonah Pryce |
| The Accidental Husband | 2008 | | Mr. Bollenbecker |
| The Good Shepherd | 2006 | | Senator John Russell, Sr. |
| A Lonely Sky | 2006 | Short | Older Man |
| The Day My Towers Fell | 2006 | Short | Harry Gold |
| Law & Order | 2001-2006 | TV Series | Andrew Keener / Paul Lyman |
| Alien Hunter | 2003 | | Secretary Bayer |
| Three Days of Rain | 2002 | uncredited | |
| Law & Order: Special Victims Unit | 2002 | TV Series | Judge Walt Thornburg |
| Ed | 2002 | TV Series | Robert Stanley |
| Witchblade | 2001 | TV Series | Dr. Immo |
| Songs in Ordinary Time | 2000 | TV Movie | Sam Fermoyle |
| The Divine Inspiration | 2000 | Short | |
| The Audrey Hepburn Story | 2000 | TV Movie | Joseph Hepburn |
| Oh, What a Night | 1992 | Video | Thorvald |
| Murder, She Wrote | 1989 | TV Series | Jason Reynard |
| 2010 | 1984 | | Dave Bowman |
| The Next One | 1984 | | Glenn / The Next One |
| Blind Date | 1984 | | Dr. Steiger |
| Loving Friends and Perfect Couples | 1983 | TV Series | |
| BrainWaves | 1982 | | Julian Bedford |
| No Place to Hide | 1981 | TV Movie | Cliff Letterman |
| The Hostage Tower | 1980 | TV Movie | Mr. Smith |
| Brave New World | 1980 | TV Movie | Thomas Grambell |
| The Legend of the Golden Gun | 1979 | TV Movie | General Custer |
| Because He's My Friend | 1978 | TV Movie | Eric |
| Leopard in the Snow | 1978 | | Dominic Lyall |
| Three Dangerous Ladies | 1977 | | David (segment "The Mannikin") |
| The Haunting of Julia | 1977 | | Magnus Lofting |
| Welcome to Blood City | 1977 | | Lewis |
| Mannikin | 1977 | Short | Dr. David Priestly |
| Law and Order | 1976 | TV Movie | Johnny Morrison |
| Switch | 1975 | TV Series | Anthony Kirk |
| Black Christmas | 1974 | | Peter |
| Paul and Michelle | 1974 | | Garry |
| The Starlost | 1973-1974 | TV Series | Devon |
| Paperback Hero | 1973 | | Rick Dylan |
| McMillan & Wife | 1972 | TV Series | Buzz Simms / Mr. Warlock |
| Pope Joan | 1972 | | Dr. Stevens (uncredited) |
| Devil in the Brain | 1972 | | Oscar Minno |
| A Kiss Is Just a Kiss | 1971 | TV Movie | Dr Alex Noon |
| Montserrat | 1971/I | TV Movie | Montserrat |
| Black Water Gold | 1970 | TV Movie | Christofer Perdeger |
| De Sade | 1969 | | Marquis de Sade |
| 2001: A Space Odyssey | 1968 | | Dr. Dave Bowman |
| The Fox | 1967 | | Paul Renfield |
| Madame X | 1966 | | Clay Anderson Jr. |
| Bunny Lake Is Missing | 1965 | | Steven Lake |
| 12 O'Clock High | 1965 | TV Series | Lt. Kurt Muller |
| The Wednesday Play | 1964 | TV Series | |
| The Thin Red Line | 1964 | | Pvt. Doll |
| Channing | 1964 | TV Series | Larry Franklin |
| Mail Order Bride | 1964 | | Lee Carey |
| Le ore nude | 1964 | | Aldo |
| Kraft Mystery Theater | 1962-1963 | TV Series | Tommy Miller / Tim Dryden |
| Alcoa Premiere | 1961-1963 | TV Series | Eric Green / Tommy Miller / Linc Ketterman / ... |
| Going My Way | 1963 | TV Series | Dennis Brady |
| Naked City | 1961-1963 | TV Series | Les Gerrick / Joey Ross |
| Bonanza | 1963 | TV Series | Bob Jolley |
| The United States Steel Hour | 1961-1963 | TV Series | Donald 'Don' McCabe / David March |
| Empire | 1963 | TV Series | Skip Wade |
| The Eleventh Hour | 1962 | TV Series | Jerry Bullock |
| The DuPont Show of the Week | 1962 | TV Series | Lieutenant |
| David and Lisa | 1962 | | David Clemens |
| Cain's Hundred | 1962 | TV Series | Alec Benden |
| Checkmate | 1962 | TV Series | Eddie Phillips |
| The New Breed | 1961 | TV Series | Frank |
| Play of the Week | 1961 | TV Series | Don |
| The Hoodlum Priest | 1961 | | Billy Lee Jackson |
| Give Us Barabbas! | 1961 | TV Movie | Elisha |
| Route 66 | 1960 | TV Series | Paul Garth |
| Mrs. Miniver | 1960 | TV Movie | German Pilot |
| Guiding Light | 1952 | TV Series | Dr. Mark Jarrett (1986) |
| Title | Year | Status | Character |
|---|
| Kubrick Remembered | 2014 | Documentary | Himself |
| The Real History of Science Fiction | 2014 | TV Mini-Series documentary | Himself |
| Up Late with Alec Baldwin | 2013 | TV Series | Himself - Guest |
| Years in the Making | 2010 | Documentary | Narrator |
| Cinema 3 | 2008 | TV Series | Himself |
| What Is Out There? | 2007 | Video documentary short | Himself |
| Movies That Shook the World | 2005 | TV Series documentary | Himself |
| On Screen! | 2005 | TV Series documentary | Himself |
| Stanley Kubrick: A Life in Pictures | 2001 | Documentary | Himself |
| 2001: The Making of a Myth | 2001 | TV Short documentary | Himself |
| 2001 and Beyond | 2001 | TV Movie documentary | Himself |
| Biography | 1999 | TV Series documentary | Himself |
| À la recherche de Stanley Kubrick | 1999 | Documentary | Himself |
| Night of 100 Stars III | 1990 | TV Movie | Himself |
| 2010: The Odyssey Continues | 1984 | Documentary short | Himself (uncredited) |
| Saturn Awards | 1981 | TV Special | |
| Showoffs | 1975 | TV Series | Himself |
| The Mike Douglas Show | 1974 | TV Series | Himself - Actor |
| The Virginia Graham Show | 1971 | TV Series | Himself |
| He Said, She Said | 1970 | TV Series | Himself |
| A Primer for '2001: A Space Odyssey' | 1970 | TV Movie | Himself |
| The Match Game | 1969 | TV Series | Himself - Team Captain |
| The Hollywood Squares | 1968 | TV Series | Himself - Panelist |
| The Tonight Show Starring Johnny Carson | 1968 | TV Series | Himself - Guest |
| The Making of '2001' | 1968 | Documentary short | Himself |
| Late Show London | 1966 | TV Series | Himself |
| 2001: A Space Odyssey - A Look Behind the Future | 1966 | Documentary short | Himself |
| The Merv Griffin Show | 1965 | TV Series | Himself |