Alfie Evan Allen (born September 12, 1986) is an English actor, best known for his role as Theon Greyjoy on 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).