The Secret History of Jon Snow: 15 Fascinating Facts About Kit Harington

1. He Didn't Know His Real Name Until He Was Eleven

Kit was born Christopher Catesby Harington, but his family exclusively called him Kit from the day he was born. He actually did not discover that his legal first name was Christopher until he sat for a school exam at eleven years old and wrote "Kit Harington" on his paper, only for his teacher to correct him. He has stated in interviews that he strongly prefers "Kit" because it is a traditional short form of Christopher dating back to the Elizabethan era. The moniker carries historical weight in English literature, notably shared by playwright Kit Marlowe. Today, he remains professionally and personally known almost entirely by his childhood name.

2. He Is Directly Descended from the Mastermind of the Gunpowder Plot

Harington's ancestral roots tie directly into one of Britain’s most infamous historical events, the 1605 Gunpowder Plot. His maternal ancestor was Robert Catesby, the aristocratic mastermind behind the Catholic conspiracy to blow up the Houses of Parliament, rather than Guy Fawkes who was merely tasked with guarding the explosives. Harington's full middle name, Catesby, directly honors this dramatic family line. Driven by his personal connection to the history, Harington later co-created, produced, and starred in the 2017 BBC historical drama Gunpowder, portraying his own radical ancestor on screen.

3. His Ancestor Invented the Flush Toilet for Queen Elizabeth I

The actor's notable lineage extends further into royal Tudor history through his paternal ancestor Sir John Harington. Sir John was a prominent writer, courtier, and godson to Queen Elizabeth I, who invented the first operational flush toilet in 1596, which he named the Ajax. The Queen was so impressed with the device that she had one installed in Richmond Palace. Modern slang in North America occasionally refers to the toilet as "the john," which several historians trace back to Sir John Harington’s groundbreaking invention. Harington frequently jokes in interviews about his family's unique claim to royal sanitation history.

4. He Made His Professional Stage Debut as the Lead in War Horse

Before ever stepping in front of a television camera, Harington achieved rapid theatrical acclaim while still in drama school. While completing his training at the prestigious Royal Central School of Speech & Drama in London, he auditioned for and won the lead role of Albert Narracott in the National Theatre’s original 2009 West End production of War Horse. The play became a massive theatrical sensation and won multiple Olivier Awards, putting Harington on the radar of international casting directors. His impressive emotional performance directly helped him land his iconic television audition shortly after graduating.

5. Game of Thrones Was His First-Ever On-Screen Acting Role

When Harington landed the iconic role of Jon Snow in HBO’s flagship fantasy series Game of Thrones in 2011, he had zero prior screen acting experience. During his final callback audition, he famously arrived with a black eye after getting into a late-night scuffle at a local fast-food restaurant. Despite his lack of camera experience, executive producers immediately recognized his brooding intensity and vulnerable charisma. The series went on to become one of the most decorated shows in television history, earning Harington two Primetime Emmy Award nominations and a Golden Globe nomination.

6. He Broke His Ankle Breaking Into His Own Apartment

During the hiatus prior to filming the third season of Game of Thrones, Harington suffered a severe injury that nearly halted production. After returning home late one evening in London without his keys, he attempted to climb the exterior wall of his building to enter his top-floor apartment. He lost his grip, fell from a significant height, and severely fractured his ankle, requiring major surgery. The show's production team had to adjust shooting schedules, utilize stunt doubles, and carefully frame shots around his immobilized leg for months. Harington later admitted that the risky incident was a severe wake-up call regarding his personal safety.

7. He Married His Co-Star Rose Leslie in Her Family's 12th-Century Castle

Life famously mirrored fiction when Harington fell in love with Scottish actress Rose Leslie, who played his on-screen wildling love interest Ygritte. The pair began dating in 2012 while filming their romantic narrative arc on location in the frozen landscapes of Iceland. They officially married in June 2018 at Wardhill Castle in Aberdeenshire, Scotland, an ancestral estate that has belonged to Leslie's family for over nine centuries. A wide roster of their Game of Thrones co-stars attended the private ceremony, celebrating a genuine romance born from their on-screen chemistry.

8. He Portrayed Marvel's Black Knight in Eternals

In 2021, Harington officially joined the Marvel Cinematic Universe by co-starring in director Chloé Zhao’s blockbuster superhero epic Eternals. He played Dane Whitman, a modern-day human history professor who shares a romantic connection with the immortal warrior Sersi, played by Gemma Chan. Comic book enthusiasts recognized his character as the alter ego of the superhero Black Knight, keeper of the mystical Ebony Blade. A post-credits sequence teased his character’s future wielding the cursed weapon alongside other Marvel figures. Harington expressed enthusiasm for exploring a grounded human character within a massive superhero universe.

9. He Transformed His Body with an Intense Workout Regime for Pompeii

To portray the lead character Milo, a Celtic gladiator in the 2014 historical disaster movie Pompeii, Harington underwent a massive physical transformation. He spent four months prior to production committing to a brutal four-hour-a-day training regimen that combined heavy weightlifting and traditional sword fighting. He also followed a strict high-protein diet to lower his body fat significantly for the film's intense arena combat scenes. Harington later revealed that while he achieved peak physical condition, the extreme routine was mentally exhausting and difficult to maintain once filming wrapped.

10. He Voiced a Major Character in the How to Train Your Dragon Franchise

Beyond his physical live-action performances, Harington brought his distinctive voice to DreamWorks Animation’s acclaimed How to Train Your Dragon film series. He made his franchise debut in 2014’s How to Train Your Dragon 2 as Eret, Son of Eret, a gruff dragon trapper who eventually changes sides to join the heroes. Harington returned to voice the reformed dragon rider in the 2019 trilogy finale, How to Train Your Dragon: The Hidden World. His deep British baritone added a unique swagger and charm to the animated character that resonated with family audiences worldwide.

11. He Returned to the Stage as Shakespeare's Henry V

Despite his status as a major television star, Harington has consistently prioritized returning to live theatre in London. In 2022, he took on the title role in a modern revival of William Shakespeare's Henry V at the Donmar Warehouse. Directed by Max Webster, the contemporary staging explored difficult themes surrounding modern war, political propaganda, and leadership. Theatre critics praised Harington’s energetic, nuanced performance and his mastery of classical verse. The production was subsequently recorded and screened in cinemas globally as part of National Theatre Live.

12. He Challenged Audiences in Revivals of Doctor Faustus and True West

Harington has routinely selected theatrical projects that deliberate subvert his heroic screen image. In 2016, he starred as the tragic scholar in Christopher Marlowe’s Doctor Faustus at the Duke of York's Theatre, taking part in a radical modern adaptation. Two years later, he starred alongside Johnny Flynn in Sam Shepard’s intense dark comedy True West at the Vaudeville Theatre. Playing an uptight screenwriter who spirals into volatile criminality, Harington demonstrated exceptional comic timing and dramatic versatility far removed from medieval fantasy roles.

13. He Pivoted to Corporate Satire in Season Three of Industry

In 2024, Harington expanded his television repertoire by joining the third season of the hit HBO and BBC financial drama Industry. He joined the main cast as Henry Muck, the aristocratic and morally compromised founder of a green tech energy startup called Lumi. His performance as a privileged, eccentric tech founder dealing with high-stakes financial scandals added a dark, satirical dimension to his career. Critics highlighted his compelling performance as one of the standout elements of the critically lauded season.

14. He Has Been Transparent About His Mental Health and Recovery Journey

Following the intense global media pressure surrounding the conclusion of Game of Thrones, Harington chose to speak candidly about his personal struggles with anxiety and burnout. The sudden transition from complete obscurity to worldwide stardom took a heavy toll on his mental well-being during his twenties. In 2019, he voluntarily checked into a wellness retreat in Connecticut to seek professional help for stress management and alcohol dependency. Since completing treatment, Harington has publicly advocated for mental health awareness, encouraging men to seek professional psychological help without fear of stigma.

15. He Is an Active Humanitarian and Arts Charity Ambassador

Away from the entertainment industry, Harington dedicates considerable effort to international humanitarian causes and charitable work. He serves as an official ambassador for the Royal Mencap Society, a prominent UK organization dedicated to supporting individuals with learning disabilities. Additionally, he has collaborated closely with the United Nations High Commissioner for Refugees (UNHCR), traveling to refugee camps in Jordan to highlight the plight of displaced Syrian families. Harington consistently uses his celebrity platform to champion emergency relief efforts and arts funding across the globe.