2006–2011

Speleers' first professional role in 2006 was the lead in 20th Century Fox's screen version of Christopher Paolini's book Eragon.^[7] His next role, in 2008, was Jimmy Penwarden on the British prime time series Echo Beach.^[9] He also appeared in the comedy Moving Wallpaper and an episode of Moving Wallpaper: The Mole, which many saw as a parody of Echo Beach.^[10]

In 2009, Speleers took on the role of Robin Cecil Byng in the Japanese television miniseries Jiro Shirasu: Man of Honor, which highlighted the intermediary between American and Japanese negotiators at the conclusion of World War II.^[11] The next year, Speleers played Jason Grint in the fantasy-adventure television film Witchville, and starred in Aimee Powell's short film Deathless.^[12][13] In 2011, Speleers appeared in Julian Gilbey's action thriller film A Lonely Place to Die and Marion Pilowski's short film The Ride.^[8][14]

2012–2015

In 2012, Speleers starred as Jamie in Andy De Emmony's comedy horror film Love Bite, alongside Jessica Szohr and Timothy Spall.^[15][16] He appeared as the hunter Actaeon in the short promotional film Metamorphosis: Titian 2012 by Credit Suisse for an exhibition in the National Gallery.^[17][18] He was cast in the film A Dead Man in Deptford, based upon Anthony Burgess' novel of the same name, but the film was never completed.^[19][20][21] That same year, Speleers was cast in the recurring role of Jimmy Kent in the award-winning ITV series Downton Abbey.^[22][23]

The short film Turncoat (2013), from Dark Matter productions, featured Speleers as Nathan Reese.^[24][25] He then starred as Sam in the 2014 thriller Plastic, which was written and directed by Julian Gilbey for Gateway Films.^[26][27] On 12 March 2014, it was reported that Speleers was among five actors being considered for a lead role in Star Wars: The Force Awakens, but was cut during the casting process.^[28][29][30]

In 2015, Speleers had a small role in the BBC's historical drama mini-series Wolf Hall as Edward Seymour, brother of Henry VIII's third wife Jane Seymour.^[31][32] He also played a leading role in the direct-to-DVD werewolf horror film Howl, as a young train conductor overseeing the final London train.^[33] That same year, Speleers guest starred in the BBC One miniseries Partners in Crime, an adaptation of two of Agatha Christie's novels, which focused on crime-solving couple Tommy and Tuppence Beresford. Speleers appeared in three episodes based on the story N or M?, in the role of Carl Denim.^[34] Also that year, he portrayed Greg in director Omer Fast's psychological thriller Remainder.^[35][36]

2016–2020

In 2016, he played the role of Slean in ITV's epic fantasy drama television series, Beowulf: Return to the Shieldlands.^[6][37] He had a supporting role in Disney's fantasy adventure sequel Alice Through the Looking Glass from director James Bobin.^[23][38] The following year he appeared in Andy Serkis' directorial debut, the biopic Breathe, which starred Andrew Garfield and Claire Foy. The film is about paraplegic Robin Cavendish, who is recognised as having helped pioneer the development of wheelchairs equipped with mechanical lungs.^[39]

In 2017, Speleers was a producer on Barnaby Blackburn's short film Wale.^[40][41] The film, which centers on contemporary racial prejudices in Britain, was nominated for a British Academy Film Award in 2018 in the Short Film category.^[42] In late 2017, Speleers was confirmed to appear in seasons four and five of Starz's time-travel drama series Outlander as Irish smuggler and pirate Stephen Bonnet.^[43][44][45]

In 2018, Speleers starred in the dark comedy-horror film Zoo, which centers on a couple in crisis and attempting to reconcile during a zombie pandemic.^[39][46] He went on to feature in Lars von Trier's psychological thriller The House That Jack Built, which premiered at the Cannes Film Festival.^[47] On 20 August 2018, Speleers made his stage premiere in the play Rain Man, portraying the lead role of Charlie Babbitt.^[48] The play, based upon the film of the same name, was directed by Jonathan O'Boyle and toured various theatres throughout the United Kingdom.^[49][50][51]

Romantic comedy For Love or Money featured Speleers as Johnny, opposite Robert Kazinsky and Samantha Barks, in 2019.^[52][53][54] In the same year, he produced Dad Was, the second short film with director Barnaby Blackburn, which was released in 2020.^[55]

In 2020, Speleers made the final appearance in Outlander.^[56] He was also the narrator of a David Copperfield audiobook published by Penguin Classics.^[57]

2021–present

In 2023, Speleers appeared in the fourth season of You as the main antagonist Rhys Montrose. He also appeared as Jack Crusher, a main character and a secret son of the protagonist, in the final season of Star Trek: Picard.^[58] His performance earned a Saturn Award nomination as a Best Supporting Actor in a Network or Cable Television Series.^[59] This was his third Saturn Award nomination overall.

In 2024, Speleers co-starred in the romantic comedy Irish Wish alongside Lindsay Lohan,^[60] and was a guest star in an episode of the British television series The Famous Five.^[61] He will appear in Midas Man, a biographical film on Brian Epstein who managed the Beatles.^[62] He is a main character in the short film Fudge Sundae directed by Georgia Redman^[63] and signed to star in a thriller Unholy Night directed by Derek Presley.^[64]

Film

Shorts

Television

Theatre

Video games