Filmography151 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2026 | Avengers: DoomsdayMovie | Kurt Wagner / Nightcrawler | 61 |
| 2026 | Tip ToeSeries | Leo Struthers | 61 |
| 2026 | Death Do Us PartMovie | — | 61 |
| 2026 | GlenrothanMovie | Donal | 61 |
| 2026 | Toy Story 5Movie | Evil Bullseye (voice) | 61 |
| 2025 | RoboGoboSeries | Dame Luxley (voice) | 60 |
| 2024 | 92nd Annual Christmas in Rockefeller CenterMovie | Self | 59 |
| 2024 | Drive Back HomeMovie | Perley | 59 |
| 2024 | Doctor Who: UnleashedSeries | Self | 59 |
| 2024 | Doctor WhoSeries | Mr Ring-a-Ding (voice) | 59 |
| 2024 | BoardersSeries | Alan | 59 |
| 2023 | MarloweMovie | Lou Hendricks | 58 |
| 2023 | The TraitorsSeries | Self - Host | 58 |
| 2023 | Rare ObjectsMovie | Peter Kessler | 58 |
| 2023 | Mad About the Boy: The Noël Coward StoryMovie | Narrator (voice) | 58 |
| 2022 | The Jennifer Hudson ShowSeries | Self - Guest | 57 |
| 2022 | Sunday with Laura KuenssbergSeries | Self – Actor | 57 |
| 2022 | My Father's DragonMovie | Cornelius the Crocodile (voice) | 57 |
| 2022 | Ooh the Banter!Movie | Self (archive footage) | 57 |
| 2022 | My Old SchoolMovie | Brandon Lee | 57 |
| 2022 | Everything I Ever Wanted to Tell My Daughter About MenMovie | Therapist | 57 |
| 2021 | The PrinceSeries | Owen | 56 |
| 2021 | Schmigadoon!Series | Mayor Aloysius Menlove | 56 |
| 2020 | The Great Work Begins: Scenes from Angels in AmericaMovie | Alan Cumming | 55 |
| 2019 | Prodigal SonSeries | Simon Hoxley | 54 |
| 2019 | The Kelly Clarkson ShowSeries | Self | 54 |
| 2019 | Tamron HallSeries | Self - Guest | 54 |
| 2019 | Today with Jenna & SheinelleSeries | Self | 54 |
| 2018 | They'll Love Me When I'm DeadMovie | Narrator (voice) | 53 |
| 2017 | Battle of the SexesMovie | Ted Tinling | 52 |
| 2017 | The Good FightSeries | Eli Gold | 52 |
| 2017 | The Untold Tales of Armistead MaupinMovie | Self (voice) | 52 |
| 2017 | Carpool Karaoke: The SeriesSeries | Self | 52 |
| 2017 | After LouieMovie | Sam Cooper | 52 |
| 2017 | Queers.Series | — | 52 |
| 2015 | The Late Show with Stephen ColbertSeries | Self | 50 |
| 2015 | Strange MagicMovie | Bog King (voice) | 50 |
| 2014 | The Tonight Show Starring Jimmy FallonSeries | Self | 49 |
| 2014 | Late Night with Seth MeyersSeries | Self | 49 |
| 2014 | Broad CitySeries | Alan Cumming | 49 |
| 2014 | Chu and BlossomMovie | Uncle | 49 |
| 2013 | The Smurfs 2Movie | Gutsy Smurf (voice) | 48 |
| 2013 | Picasso BabyMovie | Self | 48 |
| 2013 | The Smurfs: The Legend of Smurfy HollowMovie | Gutsy Smurf (voice) | 48 |
| 2013 | Muse of FireMovie | Self | 48 |
| 2012 | The OutbackMovie | Bog (voice) | 47 |
| 2012 | Sir BilliMovie | Gordon the Goat (voice) | 47 |
| 2012 | Any Day NowMovie | Rudy Donatello | 47 |
| 2011 | Bubble GuppiesSeries | The Glitch (voice) | 46 |
| 2011 | Web TherapySeries | Austen Clarke | 46 |
| 2011 | The SmurfsMovie | Gutsy Smurf (voice) | 46 |
| 2010 | Boogie WoogieMovie | Dewey Dalamanatousis | 45 |
| 2010 | BurlesqueMovie | Alexis | 45 |
| 2010 | Jackboots on WhitehallMovie | Hitler / Braveheart (voice) | 45 |
| 2010 | The TempestMovie | Sebastian | 45 |
| 2009 | The Good WifeSeries | Eli Gold | 44 |
| 2009 | Watch What Happens Live with Andy CohenSeries | Self - Guest | 44 |
| 2009 | It's ComplicatedMovie | TV Actor (uncredited) | 44 |
| 2009 | DareMovie | Grant Matson | 44 |
| 2009 | PoliWoodMovie | Self | 44 |
| 2008 | Big Brother: Celebrity HijackSeries | Self - Hijacker | 43 |
| 2008 | Web TherapySeries | Austen Clarke | 43 |
| 2007 | Tin ManSeries | Glitch | 42 |
| 2007 | The Graham Norton ShowSeries | Self | 42 |
| 2007 | Gray MattersMovie | Gordy | 42 |
| 2007 | ShowBusiness: The Road to BroadwayMovie | Self | 42 |
| 2007 | Suffering Man's CharityMovie | John Vandermark | 42 |
| 2006 | Reefer Madness: The Movie MusicalMovie | Lecturer / Goat-Man / FDR | 41 |
| 2006 | Web Junk 20Series | — | 41 |
| 2006 | Fabulous! The Story of Queer CinemaMovie | Self | 41 |
| 2006 | Me, EloiseSeries | (voice) | 41 |
| 2006 | The Return of Bond: The Start of Production Press EventMovie | — | 41 |
| 2005 | Doctor WhoSeries | King James | 40 |
| 2005 | Ripley Under GroundMovie | Jeff Constant | 40 |
| 2005 | Son of the MaskMovie | Loki | 40 |
| 2005 | 8 Out of 10 CatsSeries | Self | 40 |
| 2005 | NeverwasMovie | Jake | 40 |
| 2005 | EighteenMovie | Father Chris | 40 |
| 2005 | Bam Bam and CelesteMovie | Eugene | 40 |
| 2005 | Paw Prints and Baby Steps: On the Set of “Son of The Mask”Movie | Self | 40 |
| 2005 | Playing It StraightSeries | Self - Narrator (voice) | 40 |
| 2004 | GarfieldMovie | Persnikitty (voice) | 39 |
| 2004 | The L WordSeries | Billie Blaikie | 39 |
| 2004 | The Tony Danza ShowSeries | Self - Guest | 39 |
| 2004 | Shoebox ZooSeries | Bruno the Bear (voice) | 39 |
| 2004 | Who Do You Think You Are?Series | Self | 39 |
| 2004 | The Goodbye GirlMovie | Mark Bodine | 39 |
| 2003 | Real Time with Bill MaherSeries | Self | 38 |
| 2003 | Jimmy Kimmel Live!Series | Self - Guest Host | 38 |
| 2003 | Spy Kids 3-D: Game OverMovie | Fegan Floop | 38 |
| 2003 | X2Movie | Kurt Wagner / Nightcrawler | 38 |
| 2003 | Introducing the Incredible Nightcrawler!Movie | Himself | 38 |
| 2003 | X2 Global Webcast HighlightsMovie | Self | 38 |
| 2002 | Searching for Debra WingerMovie | Self (uncredited) | 37 |
| 2002 | Spy Kids 2: The Island of Lost DreamsMovie | Fegan Floop | 37 |
| 2002 | V Graham NortonSeries | Self | 37 |
| 2002 | Through the Night with...Series | Self | 37 |
| 2002 | Nicholas NicklebyMovie | Mr. Folair | 37 |
| 2002 | AFI's 100 Years... 100 Passions: America's Greatest Love StoriesMovie | Self | 37 |
| 2001 | Spy KidsMovie | Fegan Floop | 36 |
| 2001 | The Anniversary PartyMovie | Joe Therrian | 36 |
| 2000 | The Flintstones in Viva Rock VegasMovie | The Great Gazoo / Mick Jagged | 35 |
| 2000 | Get CarterMovie | Jeremy Kinnear | 35 |
| 2000 | For My BabyMovie | Daniel Orgelbrand | 35 |
| 2000 | Company ManMovie | General Batista | 35 |
| 2000 | God, the Devil and BobSeries | The Devil (voice) | 35 |
| 1999 | Eyes Wide ShutMovie | Desk Clerk | 34 |
| 1999 | Plunkett & MacleaneMovie | Lord Rochester | 34 |
| 1999 | TitusMovie | Saturninus | 34 |
| 1999 | AnnieMovie | Daniel Francis "Rooster" Hannigan | 34 |
| 1998 | Sex and the CitySeries | Oscar | 33 |
| 1997 | Spice WorldMovie | Piers | 32 |
| 1997 | EP DailySeries | — | 32 |
| 1997 | BuddyMovie | Dick Croner | 32 |
| 1997 | Romy and Michele's High School ReunionMovie | Sandy Frink | 32 |
| 1996 | 3rd Rock from the SunSeries | Angus 'The Hole' McDuff | 31 |
| 1996 | The Daily ShowSeries | Self | 31 |
| 1996 | EmmaMovie | Mr. Elton | 31 |
| 1995 | GoldenEyeMovie | Boris Grishenko | 30 |
| 1995 | Circle of FriendsMovie | Sean Walsh | 30 |
| 1995 | Goldeneye: The Secret FilesMovie | Self | 30 |
| 1995 | GoldenEye: The Secret Files - The CastMovie | Self | 30 |
| 1994 | GargoylesSeries | John Castaway (voice) | 29 |
| 1994 | ButterMovie | Ronnie | 29 |
| 1994 | Black BeautyMovie | Black Beauty (voice) | 29 |
| 1994 | The High LifeSeries | Sebastian Flight | 29 |
| 1994 | Second BestMovie | Bernard | 29 |
| 1993 | FrasierSeries | Ahmrit | 28 |
| 1993 | Rik Mayall PresentsSeries | Greg Deane | 28 |
| 1993 | The Airzone SolutionMovie | MacNamara | 28 |
| 1992 | The Last RomanticsMovie | Tulloch | 27 |
| 1991 | Bernard and the GenieMovie | Bernard Bottle | 26 |
| 1990 | Have I Got News for YouSeries | Self | 25 |
| 1990 | She-PlaySeries | Nick | 25 |
| 1989 | The SimpsonsSeries | Loki (voice) | 24 |
| 1988 | LIVE with Kelly and MarkSeries | Self - Guest | 23 |
| 1987 | Shadow of the StoneSeries | Tom Henderson | 22 |
| 1986 | ScreenPlaySeries | Percy Bysshe Shelley | 21 |
| 1986 | Passing GloryMovie | Rab | 21 |
| 1985 | Screen TwoSeries | Tulloch | 20 |
| 1984 | Travelling ManSeries | Jamie | 19 |
| 1983 | TaggartSeries | Jamie McCormack | 18 |
| 1980 | Masterpiece MysterySeries | Self - Host | 15 |
| 1980 | Take the High RoadSeries | Jim Hunter | 15 |
| 1979 | Question TimeSeries | Self - Panellist | 14 |
| 1975 | Saturday Night LiveSeries | Self - Host | 10 |
| 1949 | The Emmy AwardsSeries | Self | — |
| 1949 | The BAFTA AwardsSeries | Host | — |
| 0 | The NaturalizedMovie | Self | — |
| 0 | The DiaryMovie | — | — |
| 0 | Romy and Michele 2Movie | Sandy Frink | — |