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Alfie Evan Allen (born 12 September 1986) is an English actor. He portrayed Theon Greyjoy on all eight seasons of the HBO fantasy series Game of Thrones (2011–2019), for which he received a nomination for the Primetime Emmy Award for Outstanding Supporting Actor in a Drama Series in 2019. In film, he is best known for his starring roles in John Wick (2014), The Predator (2018), and Jojo Rabbit (2019).
| Year | Title | Role | Notes |
| 1998 | You Are Here | Son | |
| Elizabeth | Arundel's Son | ||
| 2004 | Agent Cody Banks 2: Destination London | Berkhamp on Double Bass | |
| 2005 | Stoned | Harry | |
| 2006 | Sixty Six | Younger Tout | |
| 2007 | Cherries | James | Short film |
| Atonement | Danny Hardman | ||
| Joe's Palace | Jason | Television film | |
| 2008 | Flashbacks of a Fool | Kevin Hubble | |
| The Other Boleyn Girl | King's Messenger | ||
| 2009 | Freefall | Ian | |
| 2010 | Soulboy | Russ Mountjoy | |
| The Kid | Dominic | ||
| Freestyle | Jez | ||
| Powder | Wheezer | ||
| 2012 | Confine | Henry | |
| 2014 | Plastic | Yatesy | |
| John Wick | Iosef Tarasov | ||
| 2016 | Pandemic | Wheeler | |
| Patient Seven | The Man | ||
| 2018 | The Predator | Lynch | |
| 2019 | How to Build a Girl | John Kite | |
| Jojo Rabbit | Finkel | ||
| 2020 | Nightwalkers | Unnamed | Short film |
| 2021 | La Cha Cha | Dooty Davies | |
| Night Teeth | Victor | ||
| 2024 | McVeigh | Timothy McVeigh |
| Year | Title | Role | Notes |
| 1988 | The Comic Strip Presents... | Child in Promo | 1 episode |
| 1999 | Spaced | Skateboard Kid | 1 episode |
| 2005 | The Golden Hour | Clive | 1 episode |
| Jericho | Albert Hall | 1 episode | |
| 2008 | Casualty 1907 | Nobby Clark | 3 episodes |
| Coming Up | Adams | 1 episode | |
| 2010 | Accused | Michael Lang | 1 episode |
| 2011–2019 | Game of Thrones | Theon Greyjoy | 47 episodes |
| 2016 | Close to the Enemy | Ringwood | 7 episodes |
| 2017 | Football: A Brief History | Himself | 2 episodes, Documentary, History Channel |
| 2019 | Harlots | Isaac Pincher | 5 episodes |
| 2020 | White House Farm | Brett Collins | 4 episodes |
| 2022 | SAS: Rogue Heroes | Jock Lewes | 4 episodes |
| 2023 | Transformers: EarthSpark | Tarantulas (voice) | 1 episode |
| 2025 | Safe Harbor | Tobias | Main role |
| 2025 | Atomic | Max | Main role |
| Year | Title | Role | Notes |
| 2008 | Equus | Alan | UK tour |
| 2016 | The Spoils | Ben | Trafalgar Studios, London |
| 2022 | Hangmen | Mooney | John Golden Theatre, New York |
| 2025 | Dealer's Choice | Frankie | Donmar Warehouse, London |
| Year | Award | Category | Work | Result | mw- Ref. |
| 2011 | Scream Awards | Best Ensemble (shared with the cast) | Game of Thrones | Nominated | |
| Screen Actors Guild Award | Outstanding Performance by an Ensemble in a Drama Series (shared with the cast) | Nominated | |||
| 2013 | Outstanding Performance by an Ensemble in a Drama Series (shared with the cast) | Nominated | |||
| 2014 | Outstanding Performance by an Ensemble in a Drama Series (shared with the cast) | Nominated | |||
| 2015 | Empire Awards | Empire Hero Award (shared with the cast) | Won | ||
| Screen Actors Guild Award | Outstanding Performance by an Ensemble in a Drama Series (shared with the cast) | Nominated | |||
| 2016 | Outstanding Performance by an Ensemble in a Drama Series (shared with the cast) | Nominated | |||
| 2019 | Primetime Emmy Award | Outstanding Supporting Actor in a Drama Series | Nominated | ||
| 2020 | Screen Actors Guild Award | Outstanding Performance by an Ensemble in a Drama Series (shared with the cast) | Nominated | ||
| Outstanding Cast in a Motion Picture (shared with the cast) | Jojo Rabbit | Nominated | |||
| 2022 | Tony Award | Best Featured Actor in a Play | Hangmen | Nominated |