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Reeson Wayne Shearsmith (born 27 August 1969) is a British actor, comedian and writer. He was a member of The League of Gentlemen, with Steve Pemberton, Mark Gatiss and Jeremy Dyson. Jointly with Pemberton, he created, wrote and starred in the sitcom Psychoville and the dark comedy anthology series Inside No. 9. He had notable roles in Spaced and The World's End.
| Year | Title | Role | Notes |
| 1995 | The Devil of Winterborne | Andrew Powell | Video |
| 1996 | The Ghosts of Winterborne | Video short | |
| 1997 | Auton | Dr Daniel Matthews | Video |
| 1999 | This Year's Love | Tourist | |
| 2001 | Birthday Girl | Porter | |
| 2004 | Shaun of the Dead | Mark | |
| 2005 | The Hitchhiker's Guide to the Galaxy | Additional Vogon voices | |
| The League of Gentlemen's Apocalypse | Various | Also writer | |
| 2006 | Free Jimmy | Ante (voice) | English dub |
| The League of Gentlemen Are Behind You! | Various | Video | |
| 2008 | The Cottage | Peter | |
| 2010 | Burke and Hare | Sergeant Mackenzie | |
| Good Boy | Underdog | Short film | |
| 2012 | Him Indoors | Gregory Brewster | |
| 2013 | A Field in England | Whitehead | |
| The World's End | Collaborator | ||
| 2015 | High-Rise | Nathan Steele | |
| 2017 | Borley Rectory | V. C. Wall | |
| 2021 | In the Earth | Zach | |
| Venom: Let There Be Carnage | Priest | ||
| 2022 | See How They Run | John Woolf | |
| 2023 | Saltburn | Professor Ware | |
| 2024 | Wallace & Gromit: Vengeance Most Fowl | Norbot (voice) | |
| 2025 | Rogue Trooper† | Bagman | Post-production |
| † | Denotes films that have not yet been released |
| Year | Title | Role | Notes |
| 1995 | Alas Smith and Jones | Unknown | |
| London's Burning | Martin | Episode | |
| 1996 | Friday Night Armistice | Performer | |
| Mash and Peas | Jerry Berkowi | Episode: "American Sitcoms" | |
| 1998 | Lenny Goes to Town | Unknown | Episode: "Brighton" |
| Alexei Sayle's Merry-Go-Round | Phillip Arthurs | Episode | |
| In the Red | Broadcast Journalist | 3 episodes | |
| 1999–2002, 2017 | The League of Gentlemen | Various | 22 episodes; also writer |
| 2000 | Randall and Hopkirk (Deceased) | Helium Harry | Episode: "Two Can Play at That Game" |
| 2001 | Spaced | Dexter | 2 episodes |
| 2002 | TLC | Dr. Laurence Flynn | 6 episodes |
| Robbie the Reindeer: Legend of the Lost Tribe | Viking (voice) | Television film | |
| 2004 | Catterick | Tony | 6 episodes |
| Monkey Trousers | Various | Television film | |
| Max and Paddy's Road to Nowhere | Bobster | Episode | |
| 2007 | The Abbey | Dr. Darren | Television film |
| Agatha Christie's Marple | Inspector Huish | Episode: "Ordeal by Innocence" | |
| Modern Men | Actor | ||
| Comedy Showcase | Freddie | Episode: "Ladies and Gentlemen" | |
| Christmas at the Riviera | Ashley | Television film | |
| 2008 | New Tricks | Jeremy Kirk | Episode: "A Face for Radio" |
| Coming Up | Lickle Bill Um | Episode: "Lickle Bill Um" | |
| 2009 | Would I Lie to You? | Himself | Episode |
| Mid Life Christmas | Vicar | Television film | |
| 2009–2011 | Psychoville | Various | 14 episodes; also writer |
| 2010 | The First Men in the Moon | Moon | Television film |
| The Bear | Luka | Television film | |
| 2011 | Eric and Ernie | Harry Wiseman | Television film |
| 2012 | The Hollow Crown | Davy | Episode: "Henry IV, Part II" |
| Comedy Showcase | Bracket | Episode: "The Function Room" | |
| Swiftcover SwiftBrothers advertising campaign | Voice actor | ||
| Comedy Showcase | Greg | Episode: "Bad Sugar" | |
| Silent Night of the Living Dead | Actor | ||
| 2012–2013 | Horrible Histories | Hollywood Producer | 10 episodes |
| 2013 | An Adventure in Space and Time | Patrick Troughton | Television film |
| 2013–2014 | Psychobitches | Various | 2 episodes |
| 2014 | The Widower | Malcolm Webster | 3 episodes |
| Chasing Shadows | DS Sean Stone | 4 episodes | |
| House of Fools | Martin / Santa | 2 episodes | |
| Dead Funny: Horror Stories by Comedians | Writer | ||
| 2014–2024 | Inside No. 9 | Various | Also writer and director; 53 episodes |
| 2015 | Peter Kay's Car Share | Ray the Fishmonger | Episode |
| Doctor Who | Gagan Rassmussen | Episode: "Sleep No More" | |
| Hunderby | Pastor John | 2 episodes | |
| 2016 | Galavant | Neo of Sporin | Episode: "Love and Death" |
| Mid Morning Matters with Alan Partridge | Jasper Jones | Episode: "Jasper + Chef" | |
| Stag | Wendy | 2 episodes | |
| Diddy TV | Mr. Stockholm | 4 episodes | |
| 2019 | Good Omens | William ShakespeareFurfur | Season 1: 1 episodeSeason 2: 3 episodes |
| Year | Title | Role | Notes |
| 1995 | The League of Gentlemen | Various / writer | Edinburgh Fringe Festival |
| 2001 | The League of Gentlemen: A Local Show for Local People | Various / writer | UK tour |
| Theatre Royal, Drury Lane | |||
| 2002 | 'Art' | Yvan | Whitehall Theatre |
| 2005 | The League of Gentlemen Are Behind You! | Various / writer | UK tour |
| As You Like It | Jacques | Wyndham's Theatre | |
| 2006 | The Producers | Leo Bloom | Theatre Royal, Drury Lane |
| 2008 | The Common Pursuit | Nick | Menier Chocolate Factory |
| 2009 | Comedians | Phil Murray | Lyric Hammersmith |
| 2010 | Ghost Stories | Professor Phillip Goodman | Duke of York's Theatre |
| 2011 | Betty Blue Eyes | Gilbert Chilvers | Novello Theatre |
| 2012 | Absent Friends | Colin | Harold Pinter Theatre |
| 2014 | Cool Rider | Mr Stewart | Lyric Theatre, London |
| 2015 | Hangmen | Syd Armfield | Royal Court Theatre |
| 2016 | The Dresser | Norman | Duke of York's Theatre |
| 2018 | Hangmen | Syd Armfield | Atlantic Theater Company |
| The League of Gentlemen Live Again! | Various / writer | UK tour | |
| 2019 | A Very Expensive Poison | The President / Jon | The Old Vic |
| 2022 | The Unfriend | Peter | Minerva Theatre, Chichester |
| 2023 | Criterion Theatre, London | ||
| 2025 | Inside No. 9 Stage/Fright | Various / writer | Wyndham's Theatre, London |
| UK tour |
| Year | Title | Role |
| 2000 | A Local Book for Local People | Writer |
| Year | Title | Role |
| 1997 | On the Town with The League of Gentlemen | Writer/Actor |
| 2012 | Bird Island | Ben Jones |