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Aidan O'Callaghan

Aidan O'Callaghan

Acting

Biography

Aidan O'Callaghan is an accomplished actor recognized for his compelling performances across television, film, and theatre. His role as Kareg in The Witcher: Blood Origin (Netflix) marked a significant milestone in his career, placing him within the expansive and beloved Witcher franchise. This Netflix prequel, which features an ensemble cast including Michelle Yeoh and Jodie Turner-Smith, has captivated audiences worldwide, amassing over 30 million views since its release. In addition to The Witcher, Aidan has showcased his versatility in various projects, including notable international television series such as The Rook (Starz) and Wolfe (Sky). His film credits include the BAFTA and Oscar contender A Simple Killing (2024) and Somatic (2016), where he took on complex roles that demonstrate his range as an actor. While his early recognition came from his time on EastEnders and Emerdale, it is his dynamic performances and dedication to his craft that continue to resonate with audiences. With a growing reputation for tackling diverse characters, Aidan O'Callaghan is poised for an exciting future in the entertainment industry, captivating viewers with each new role he takes on.

Known For

EastEnders
4.2

The everyday lives of working-class residents of Albert Square, a traditional Victorian square of terrace houses surrounding a park in the East End of London's Walford borough.

EastEnders

1985
Emmerdale
4.3

The lives of several families in the Yorkshire Dales revolve around a farm and the nearby village. With murders, affairs, lies, deceit, laughter and tears, it's all there in the village.

Emmerdale

1972
The Witcher: Blood Origin
6.5

More than a thousand years before the world of The Witcher, seven outcasts in the elven world unite in a blood quest against an unstoppable power.

The Witcher: Blood Origin

2022
Wolfe
5.8

The adventures of Professor Wolfe Kinteh, a crime scene investigator in the north of England.

Wolfe

2021
The Rook
6.4

After waking in a park with total amnesia — and surrounded by dead bodies, all wearing latex gloves — a young woman must fight to uncover her past, and resume her position at the head of Britain’s most secret (supernatural) service before the traitors who stole her memory can finish what they started.

The Rook

2019
Housewarming
4.0

Saskia has just moved into her first house, but the dream is tainted by an unexpected arrival.

Housewarming

2024
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N/A

In a remote safe house on the borderlands of Northern Ireland, ex-IRA volunteer Erin Morrigan is dying from cancer. Living alone, she self-medicates using homemade opiates mixed with alcohol. The potent concoction causes hallucinatory flashbacks to her life as one of the ‘Unknowns’ an elite IRA unit that interrogated and killed suspected informers, burying them in the surrounding countryside. Haunted by the daily visitations, her private torment is further disturbed by the arrival of a teenaged boy, who bears a striking resemblance to one of her victims: an infiltrator whom she had once loved. A fervent young recruit, on the run after accidentally shooting a girl in a Derry riot, needing a place to hide. Erin allows him to stay and, as she deteriorates, the boy becomes her carer and confessor, an unready witness to her fight with her relentless demons.

The Reckoning of Erin Morrigan

2025
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N/A

A short film directed by Bedeyuri Fernandes.

Creep House

2014
A Simple Killing
N/A

While trying to take her own life, Mai is interrupted when a young, pregnant woman in distress calls to her door in desperate need of help.

A Simple Killing

2024