| movie | Avengers: Doomsday (2026)As Magneto | (Not seen) |
| tv | ted (2024)As Narrator (voice) | (Not seen) |
| tv | Gen V (2023)As Quilt Documentary Narrator (voice) | (Not seen) |
| movie | The Good Liar (2019)As Roy Courtnay | (Not seen) |
| movie | Cats (2019)As Gus, the Theatre Cat | (Not seen) |
| movie | Beauty and the Beast (2017)As Cogsworth | (Not seen) |
| tv | The Late Show with Stephen Colbert (2015)As Self - Guest | (Not seen) |
| movie | Mr. Holmes (2015)As Sherlock Holmes | (Not seen) |
| tv | Variety Studio: Actors on Actors (2014)As Self | (Not seen) |
| tv | Late Night with Seth Meyers (2014)As Self - Guest | (Not seen) |
| movie | The Hobbit: The Battle of the Five Armies (2014)As Gandalf | (Not seen) |
| movie | X-Men: Days of Future Past (2014) (AKA "X-Men: First Class 2")As Erik Lehnsherr / Magneto (Old) | (Not seen) |
| movie | The Hobbit: The Desolation of Smaug (2013) (AKA "The Hobbit Part 2")As Gandalf | (Not seen) |
| movie | The Wolverine (2013) (AKA "Wolverine: Samurai")As Erik Lehnsherr / Magneto (uncredited) | (Not seen) |
| movie | The Hobbit: An Unexpected Journey (2012)As Gandalf | (Not seen) |
| tv | The Graham Norton Show (2007)As Self - Guest | (Not seen) |
| movie | The Golden Compass (2007)As Iorek Byrnison (voice) | (Not seen) |
| movie | Stardust (2007)As Narrator (voice) | (Not seen) |
| movie | Fabulous! The Story of Queer Cinema (2006) | (Not seen) |
| movie | Flushed Away (2006)As The Toad (voice) | (Not seen) |
| movie | Doogal (2006)As Zebedee (voice) | (Not seen) |
| movie | X-Men: The Last Stand (2006) (AKA "X-Men 3")As Eric Lehnsherr / Magneto | (Not seen) |
| movie | The Da Vinci Code (2006)As Sir Leigh Teabing | (Not seen) |
| tv | Extras (2005)As Ian McKellen | (Not seen) |
| tv | Real Time with Bill Maher (2003)As Self | (Not seen) |
| movie | Emile (2003) (AKA "Émile")As Emile | (Not seen) |
| movie | The Lord of the Rings: The Return of the King (2003)As Gandalf | (Not seen) |
| movie | X2: X-Men United (2003) (AKA "X-Men 2")As Eric Lehnsherr / Magneto | (Not seen) |
| movie | The Lord of the Rings: The Two Towers (2002)As Gandalf | (Not seen) |
| movie | "National Geographic Explorer" Beyond the Movie: The Lord of the Rings (2001) (AKA "National Geographic - Beyond the Movie: The Lord of the Rings")As Self | (Not seen) |
| movie | The Lord of the Rings: The Fellowship of the Ring (2001) (AKA "The Fellowship of the Ring")As Gandalf | (Not seen) |
| movie | X-Men (2000)As Eric Lehnsherr / Magneto | (Not seen) |
| tv | Family Guy (1999)As Dr. Cecil Pritchfield (voice) | (Not seen) |
| movie | Gods and Monsters (1998)As James Whale | (Not seen) |
| movie | Apt Pupil (1998)As Kurt Dussander | (Not seen) |
| movie | Swept from the Sea (1997)As Dr. James Kennedy | (Not seen) |
| movie | Bent (1997)As Uncle Freddie | (Not seen) |
| movie | Rasputin (1996) (AKA "Rasputin: Dark Servant of Destiny")As Tsar Nicholas II | (Not seen) |
| movie | Richard III (1995)As Richard III | (Not seen) |
| movie | The Shadow (1994)As Dr. Reinhardt Lane | (Not seen) |
| movie | And the Band Played On (1993)As Bill Kraus | (Not seen) |
| movie | Six Degrees of Separation (1993)As Geoffrey Miller | (Not seen) |
| movie | Last Action Hero (1993) (AKA "Extremely Violent")As Death | (Not seen) |
| tv | The Simpsons (1989)As Ian McKellen (voice) | (Not seen) |
| movie | Scandal (1989)As John Profumo | (Not seen) |
| movie | Plenty (1985)As Sir Andrew Charleson | (Not seen) |
| movie | The Keep (1983)As Dr. Theodore Cuza | (Not seen) |
| movie | Priest of Love (1981)As D.H. Lawrence | (Not seen) |
| tv | Saturday Night Live (1975)As Self - Host | (Not seen) |
| tv | The Oscars (1953)As Self | (Not seen) |