Alfie Allen spent years quietly building an acting career before Game of Thrones handed him Theon Greyjoy and approximately every emotional catastrophe Westeros could devise. What began as an arrogant young nobleman became one of the series’ most complicated characters, allowing Allen to move from swagger and betrayal through terror, humiliation, guilt and redemption. By the end, viewers who had once happily shouted abuse at Theon were cheering for him instead—which is quite an achievement when your character has previously made some spectacularly poor life choices.

Alfie Evan Allen was born on September 12, 1986, in Hammersmith, London, into a family already thoroughly acquainted with entertainment. His father, Keith Allen, is an actor and musician, while his mother, Alison Owen, is a film producer. His older sister is singer and songwriter Lily Allen. With that collection around the dinner table, announcing that he intended to become an accountant might actually have been the rebellious career choice.

His connection with his sister produced one of the more unusual pieces of Alfie Allen trivia. Lily Allen's song “Alfie,” from her debut album Alright, Still, was written about her younger brother and presented a less-than-flattering picture of his youthful habits. Most siblings have embarrassing childhood photographs. Alfie had his sister put hers to music and release it internationally.

Allen began acting professionally as a child. His early screen appearance came in the 1998 Channel 4 comedy You Are Here, written by Matt Lucas and David Walliams. That same year, he and Lily appeared in the historical drama Elizabeth, starring Cate Blanchett. The film was produced by their mother, Alison Owen.

Small roles followed as Allen gradually accumulated experience. He appeared in Agent Cody Banks 2: Destination London, which was directed by his uncle Kevin Allen, and later had a small role in Joe Wright's acclaimed drama Atonement. Television work included Casualty 1907, while his other early film appearances included Flashbacks of a Fool, The Other Boleyn Girl, Freestyle, The Kid, Soulboy and Powder.

There was also important stage work. In 2008, Allen took over the central role of Alan Strang from Daniel Radcliffe in a touring production of Peter Shaffer's Equus. It was demanding material and gave Allen an opportunity to demonstrate dramatic ability well before anybody in Westeros started wondering whether inviting him home to the Iron Islands was a good idea.

By 2010, Allen was an experienced working actor, but hardly an international star.

Then came Game of Thrones.

Interestingly, Theon Greyjoy was not originally the character Allen hoped to play. He auditioned for Jon Snow, the role that eventually went to Kit Harington. Instead, Allen was cast as Theon, the ward of Eddard Stark and surviving son of Balon Greyjoy.

In hindsight, losing Jon Snow may have been one of the better disappointments of his career.

Theon Greyjoy initially appears to be one of the more confident young men at Winterfell. He is cocky, flirtatious and frequently smug, living alongside the Stark children while never quite being one of them. Beneath that confidence, however, is the central problem that eventually drives much of his story: Theon doesn't really know where he belongs.

He was taken from his family as a child following his father's failed rebellion and raised at Winterfell as Eddard Stark's ward—and, implicitly, as a hostage guaranteeing Balon Greyjoy's continued good behavior. The Starks treat him largely as one of their household, particularly Robb Stark, who becomes his close friend. Yet Theon remains a Greyjoy.

That divided identity becomes disastrous.

When Robb sends Theon to the Iron Islands seeking an alliance with Balon Greyjoy, Theon expects to return as a son worthy of respect. Instead, his father regards him as someone who has adopted the customs of the mainland. His sister Yara commands considerably more respect among the Ironborn than he does.

Desperate to prove himself, Theon makes a succession of increasingly catastrophic decisions.

He betrays Robb Stark, attacks the North and seizes Winterfell. It is precisely the sort of plan that seems impressive until approximately five minutes after carrying it out.

Allen played this phase of Theon with just enough insecurity beneath the arrogance to suggest that the character knew, somewhere inside himself, that he was desperately trying to become somebody he wasn't. That distinction became increasingly important because Game of Thrones was about to take Theon somewhere much darker.

After losing Winterfell, Theon falls into the hands of Ramsay Snow, later Ramsay Bolton, played with terrifying enthusiasm by Iwan Rheon.

What follows is among the bleakest storylines in Game of Thrones.

Ramsay systematically tortures Theon physically and psychologically, stripping away his identity until he responds to the name “Reek.” Allen's performance changes dramatically. The confident posture disappears. His movements become nervous and guarded, his face reflects constant fear, and even his speech suggests a man who has learned that saying the wrong thing can bring terrible consequences.

It would have been easy for Reek to become little more than a victim. Allen instead made the character's internal struggle visible even when Theon had relatively little dialogue. Tiny expressions and moments of hesitation became important because the audience was watching for evidence that some fragment of Theon Greyjoy remained.

That made his eventual resistance meaningful.

Theon's relationship with Sansa Stark becomes an important part of his recovery. After initially being too terrified to help her, he eventually finds enough courage to assist Sansa in escaping Winterfell. Their leap from the castle walls becomes more than an escape from Ramsay; it marks the beginning of Theon's long and uncertain journey back toward himself.

Redemption in Game of Thrones rarely comes conveniently, and Theon's certainly doesn't.

He continues to struggle with fear and guilt. When his uncle Euron Greyjoy attacks Yara's fleet and captures her, Theon initially jumps overboard rather than trying to save her. It is another failure, but this time he understands exactly what he has done.

Rather than ending his story there, the series allows Theon to continue rebuilding himself.

He earns the respect of surviving Ironborn followers, sets out to rescue Yara and eventually succeeds in freeing his sister. When she gives him permission to return to Winterfell and fight alongside the Starks, Theon's divided loyalties finally begin to resolve themselves.

The boy who never knew whether he was Stark or Greyjoy eventually realizes that he can honor both.

During the Battle of Winterfell, Theon volunteers to defend Bran Stark in the godswood from the Night King and the Army of the Dead. It brings him back to the place where so much of his story began and where his greatest betrayal occurred.

There, Theon's journey reaches its conclusion.

Bran acknowledges him, telling him that he is a good man, and Theon makes a final charge against the Night King knowing that he is almost certainly going to die.

For a character introduced as a swaggering young man desperate for approval, it is an extraordinary transformation. He finally performs a courageous act without an audience to impress, a title to win or a father whose approval he is seeking.

Allen's work throughout that journey was eventually recognized by the Television Academy. For the final season of Game of Thrones, he received a 2019 Emmy nomination for Outstanding Supporting Actor in a Drama Series. The nomination was particularly notable after eight seasons of playing a character whose performance frequently depended upon internal conflict rather than grand speeches.

Theon also became something perhaps more valuable than an awards nominee: a genuine fan favorite.

That would have seemed improbable during the character's occupation of Winterfell. Yet Allen managed to keep enough humanity visible beneath Theon's worst behavior that audiences could understand him without necessarily forgiving him. Later, when the character suffered, recovered and attempted to make amends, viewers had years of history invested in the outcome.

Allen did not allow Game of Thrones to become his entire career.

While appearing in the series, he played Iosef Tarasov in the 2014 action film John Wick. Iosef is the spectacularly foolish young gangster who steals John Wick's car and kills his dog, thereby discovering one of cinema's more important rules: if Keanu Reeves is quietly grieving and minding his own business, leave the man alone.

The role was very different from Theon but again benefited from Allen's ability to play arrogance with insecurity underneath it. Iosef believes his father's criminal empire will protect him until he gradually realizes precisely whose car he stole.

Spoiler: it does not improve his week.

Allen later appeared in films including Pandemic and The Predator. In 2019, he joined Taika Waititi's satirical film Jojo Rabbit, playing Finkel, the subordinate and companion of Sam Rockwell's Captain Klenzendorf. The film combined absurd comedy with increasingly serious material and received widespread recognition, including an Academy Award for Best Adapted Screenplay.

He has continued working across film and television, demonstrating that the end of Game of Thrones did not mean the end of audiences seeing Alfie Allen.

Away from acting, Allen is an enthusiastic football supporter. He is an Arsenal fan—despite his father supporting Fulham—and in 2016 presented the History Channel documentary Football: A Brief History, exploring the development and culture of association football. The production took him through aspects of the game's history and included visits connected with British football culture.

Allen is also a father. His daughter, Arrow, was born in 2018, adding a considerably gentler role to a career containing medieval warfare, psychopathic torturers, professional assassins and alien predators.

Yet Theon Greyjoy remains the performance most closely associated with his name, and understandably so.

Few television characters traveled as far emotionally. Theon could be irritating, amusing, arrogant, pathetic, cruel, terrified, courageous and heartbreaking, sometimes within remarkably short periods. His story asked viewers whether someone who had committed terrible betrayals could genuinely change and whether redemption depended upon being forgiven by others or finally choosing to do what was right.

Allen made all of those versions feel like the same man.

That is why Theon's eventual popularity mattered. Audiences didn't simply forget what he had done. They watched him confront it. His redemption worked because it was neither quick nor comfortable, and Allen had the difficult job of carrying the character through every stage.

He entered Game of Thrones having originally auditioned to play Jon Snow and instead received a character who spent much of the series making mistakes, suffering for them and trying desperately to discover who he really was.

Jon Snow may have known nothing. Alfie Allen, meanwhile, got one hell of a part.