| 2024 | Argylle - Espião Secreto | Director Fowler |
| 2024 | Nautilus | The White Rajah |
| — | Too Much | |
| — | Fado! | |
| — | The Thursday Murder Club | |
| — | Wittgenstein's Poker | Ludwig Wittgenstein (voice) |
| — | The Queen of Fashion | Evelyn Delves Broughton |
| — | Savage House | Sir Chauncey Savage |
| — | Nuremberg | Sir David Maxwell-Fyfe |
| — | Wildwood | (voice) |
| — | Death of a Unicorn | |
| — | The Post Office Girl | |
| 2022 | Frankly | Self |
| 2022 | A Royal Grand Design | Host |
| 2021 | Moley | The Gardener (voice) |
| 2021 | Agatha & Poirot: Partners in Crime | Self - Host |
| 2021 | Write Around the World with Richard E Grant | Self - Presenter |
| 2020 | Groundhog Dave 2 | Groundhog Dave |
| 2019 | The Space: Theatre of Survival | as Self |
| 2017 | Tate Britain's Great Art Walks | Self |
| 2015 | Wellington: The Iron Duke Unmasked | The Duke of Wellington |
| 2014 | The Kumars | Self |
| 2014 | Dirty Weekenders in France | Self - Presenter |
| 2012 | The Wildebeest Migration: Nature's Greatest Journey | Narrator |
| 2012 | Words of the Titanic | Reader |
| 2012 | Cherrywood Cannon | (Voice) |
| 2006 | Pulp: The Story of Common People | Narrator |
| 2006 | Above and Beyond | |
| 2005 | The Story of ‘Fairytale of New York’ | Narrator |
| 2004 | 90 Days in Hollywood | |
| 2002 | Robert Altman in England | Himself |
| 1999 | The Peculiar Memories of Bruce Robinson | Self |
| 1999 | I Demand to Have Some Booze! | Self |
| 1999 | Home Farm Twins | |
| 1998 | Cash in Hand | Sir Harry Parkins |
| 1997 | Captain Star | |
| 1997 | Treasure Island | Long John Silver |
| 1997 | An Audience with Elton John | Self |
| 1996 | An Evening with Lily Savage | Self - Audience Member |
| 1996 | In Search of Dracula | Self |
| — | The Guinea Pig Club | Archie McIndoe |
| 2023 | Saltburn | Sir James Catton |
| 2023 | The Lesson | J.M. Sinclair |
| 2023 | The Coronation Concert | Self |
| 2022 | Persuasion | Sir Walter Elliot |
| 2022 | Suspect | Harry |
| 2022 | RuPaul's Drag Race UK vs The World | Self - Guest Judge |
| 2022 | Ant & Dec's Limitless Win | Self |
| 2021 | Loki | Classic Loki |
| 2021 | O Guarda-Costas e a Mulher do Assassino | Seifert |
| 2021 | Marvel Studios UNIDOS | Self - Classic Loki |
| 2021 | Quem és tu, Robin? | Magpie (voice) |
| 2021 | Everybody's Talking About Jamie | Hugo Battersby / Loco Chanelle |
| 2021 | Os Maiores Clichés de Hollywood | Self - Actor |
| 2021 | The Outlaws | The Earl |
| 2021 | A Espinha da Noite | The Guardian |
| 2021 | An Audience with Adele | Self |
| 2021 | Marvel Studios' 2021 Disney+ Day Special | Classic Loki (archive footage) |
| 2020 | Dispatches from Elsewhere | Octavio |
| 2020 | The Skywalker Legacy | Self |
| 2020 | Ben Platt: Live from Radio City Music Hall | Self |
| 2020 | Michael McIntyre's The Wheel | Self - Expert |
| 2020 | O Convite Real do Mestre Moley | The Gardener (voice) |
| 2020 | Between the Covers | |
| 2019 | Star Wars: Episódio IX - A Ascensão de Skywalker | Allegiant General Pryde |
| 2019 | Palm Beach | Billy |
| 2019 | An Accidental Studio | Self |
| 2019 | 7 Up & Me | Self |
| 2018 | O Quebra-Nozes e os Quatro Reinos | Shiver |
| 2018 | Can You Ever Forgive Me? | Jack Hock |
| 2018 | Hang Ups | Leonard Conrad |
| 2017 | Logan | Dr. Zander Rice |
| 2017 | O Guarda-Costas e o Assassino | Seifert |
| 2017 | Lemony Snicket Desventuras em Série | Man with Beard But No Hair |
| 2017 | Heróis da Nação | Roger Swain |
| 2016 | Jackie | Bill Walton |
| 2016 | The Last Dragonslayer | Dragon (voice) |
| 2015 | Dig | Ian Margrove |
| 2015 | Pela Rainha | Major Cross |
| 2015 | Jekyll and Hyde | Sir Roger Bulstrode |
| 2015 | Teeth | |
| 2015 | Close Up with The Hollywood Reporter | Self |
| 2015 | The Gospel of Luke | Narrator (voice) – New International Version |
| 2015 | The Secret World of Lewis Carroll | Himself - Actor |
| 2014 | Late Night with Seth Meyers | Self |
| 2013 | Dá Tempo ao Tempo | Lawyer in Play (uncredited) |
| 2013 | Dom Hemingway | Dickie Black |
| 2013 | Khumba | Bradley (voice) |
| 2013 | Hello: A Portrait Of Leslie Phillips | Self / Larry Oliphant |
| 2012 | Girls | Jasper |
| 2012 | Zambézia | Cecil (voice) |
| 2012 | Doctor Who: The Snowmen | Dr. Walter Simeon |
| 2012 | Retrato de Ralph Steadman | Self |
| 2012 | Gadget Man | |
| 2012 | Kath & Kimderella | Alain the Page |
| 2012 | The Fear | Seb Whiting |
| 2011 | A Guerra dos Tronos | Izembaro |
| 2011 | A Dama de Ferro | Michael Heseltine |
| 2011 | O Menino de Ouro | Mr. Potts |
| 2011 | Henry o Terrível - O Filme | Vic Van Wrinkle |
| 2011 | Sotto il vestito niente - L'ultima sfilata | Federico Marinoni |
| 2011 | Pétala Escarlate, Flor Branca | Doctor Curlew |
| 2011 | How to Stop Being a Loser | Ian |
| 2010 | Downton Abbey | Simon Bricker |
| 2010 | O Quebra-Nozes: A História que Ninguém Contou! | Father |
| 2010 | Jackboots on Whitehall | The Vicar (voice) |
| 2010 | Cuckoo | Professor Julius Greengrass |
| 2010 | First Night | Adam |
| 2010 | The Man Who Married Himself | Olivier |
| 2009 | Os Danos do Amor | Ben Bingham |
| 2008 | Sujidade & Sabedoria | Prof Flynn |
| 2008 | Garden of Eden | Colonel Philip Boyle |
| 2007 | The Graham Norton Show | Self |
| 2007 | Would I Lie to You? | Self |
| 2007 | The Blood Is the Life: The Making of 'Bram Stoker's Dracula' | Self (archive footage) |
| 2007 | Always Crashing in the Same Car | James Booth |
| 2006 | Garfield 2 | Preston (voice) |
| 2006 | Penelope | Franklin Wilhern |
| 2006 | The One Show | Self - Guest |
| 2006 | The Secret Policeman's Ball: The Ball in the Hall | Self |
| 2006 | Above and Beyond | Don Bennett |
| 2005 | A Noiva Cadáver | Barkis Bittern (voice) |
| 2005 | Doctor Who | The Great Intelligence |
| 2005 | Doctor Who | Dr Simeon |
| 2005 | Totalmente Kubrick | Jasper |
| 2005 | 8 Out of 10 Cats | Self |
| 2005 | The Friday Night Project | |
| 2004 | Agatha Christie's Marple | Raymond West |
| 2004 | The Story of Bohemian Rhapsody | Narrator (voice) |
| 2004 | The Story of an African Farm | Bonaparte Blenkins |
| 2003 | QI | Self |
| 2003 | Sexo, Escândalos e Celebridade | Father Rothschild |
| 2003 | Monsieur N. | Hudson Lowe |
| 2003 | Doctor Who: Scream of the Shalka | The Doctor (voice) |
| 2003 | Posh Nosh | Simon Marchmont |
| 2002 | The Hound of the Baskervilles | Jack Stapleton |
| 2002 | Ant & Dec's Saturday Night Takeaway | Self - Guest Announcer |
| 2002 | Sherlock: Case of Evil | Mycroft |
| 2002 | The Making of 'Gosford Park' | Self |
| 2001 | Gosford Park | George |
| 2001 | Strictly Sinatra | Himself |
| 2001 | Hildegarde | Wolf |
| 2000 | O Pequeno Vampiro | Frederick Sackville-Bagg |
| 2000 | The Miracle Maker | John The Baptist (voice) |
| 2000 | Victoria Wood with All the Trimmings | Various Characters |
| 1999 | A Christmas Carol | Bob Cratchit |
| 1999 | Doctor Who: The Curse of Fatal Death | The Quite Handsome Doctor |
| 1999 | The Match | Gorgeous Gus |
| 1999 | Let Them Eat Cake | |
| 1999 | Withnail and Us | Self |
| 1999 | The Scarlet Pimpernel | Percy Blakeney/The Scarlet Pimpernel |
| 1998 | St. Ives | Major Farquhar Chevening |
| 1998 | The Heaven and Earth Show | |
| 1997 | Spice World - O Mundo das Spice Girls | Clifford |
| 1997 | The Serpent's Kiss | James Fitzmaurice |
| 1997 | Keep the Aspidistra Flying | Gordon Comstock |
| 1997 | Trial & Retribution | |
| 1997 | A Royal Scandal | George, Prince of Wales |
| 1997 | Portrait: Jane Campion and The Portrait of a Lady | Self |
| 1997 | Food of Love | Alex Salmon |
| 1996 | Retrato de uma Mulher | Lord Warburton |
| 1996 | Noites de Reis | Sir Andrew Aguecheek |
| 1996 | Dalziel & Pascoe | |
| 1996 | The Cold Light of Day | Viktor Marek |
| 1996 | Karaoke | Nick Balmer |
| 1995 | Jack e Sarah | Jack |
| 1995 | Soccer AM | |
| 1995 | Empire of the Censors | Self - Host |
| 1994 | Prêt-a-Porter | Cort Romney |
| 1994 | Room 101 | Self |
| 1994 | Hard Times | James Harthouse |
| 1994 | Pink Floyd: The Story | Narrator (voice) |
| 1994 | Butter | Gerrard |
| 1994 | Calliope | The Producer |
| 1994 | Hard Times | James Harthouse |
| 1993 | A Idade da Inocência | Lawrence "Larry" Lefferts |
| 1993 | Frasier | Stephen Moon |
| 1993 | Franz Kafka's It's a Wonderful Life | Franz Kafka |
| 1993 | Shooting Stars | Self |
| 1993 | The Legends of Treasure Island | Long John Silver (voice) |
| 1993 | Suddenly, Last Summer | George Holly |
| 1993 | Innocence and Experience: The Making of 'The Age of Innocence' | Self |
| 1993 | The Legends of Treasure Island | Long John Silver (voice) |
| 1992 | Drácula de Bram Stoker | Dr. Jack Seward |
| 1992 | O Jogador | Tom Oakley |
| 1992 | Absolutely Fabulous | Dream Justin |
| 1992 | The Other Side | Sherlock Holmes |
| 1991 | Hudson Hawk - O Falcão Ataca de Novo | Darwin Mayflower |
| 1991 | L.A. Story | Roland Mackey |
| 1991 | Performance | Nurse |
| 1990 | Henry & June - Delírios Eróticos | Hugo Guiler |
| 1990 | Mountains of the Moon | Oliphant |
| 1990 | Rab C. Nesbitt | Chingford Steel |
| 1989 | Sortilégio | Giles Redferne |
| 1989 | How to Get Ahead in Advertising | Denis Dimbleby Bagley |
| 1989 | Killing Dad (Or How to Love Your Mother) | Berg |
| 1989 | Here Is the News | David Dunhill |
| 1989 | Thieves in the Night | Joseph |
| 1988 | Codename: Kyril | Laurence Sculby |
| 1987 | Withnail e Eu | Withnail |
| 1987 | Hidden City | Brewster |
| 1987 | Lizzie's Pictures | |
| 1986 | Honest Decent & True | Moonee Livingstone |
| 1984 | Aspel & Company | |
| 1983 | Natural World | |
| 1978 | An Audience with... | Self |
| 1959 | No Hiding Place | |
