
Jonjo O'Neill is an actor from Northern Ireland known for his stage and television work. O'Neill was born in Belfast, grew up in the Whiterock Road area and was educated at St Mary's Grammar School. Growing up he was passionate about musical theatre and was a member of Ulster Youth Theatre and performed with the Ulster Theatre Company. In 1996 at the age of 18 he won a place and a full scholarship to the Guildford School of Acting, and moved to England. His first television role was the year he graduated from drama school, in Extremely Dangerous (1999). A member of the Royal Shakespeare Company (RSC) 2009-2011 ensemble, his roles included Mercutio in Romeo and Juliet, Orlando in As You Like It, and Launcelot in Morte D'Arthur. His performances during the RSC's six-week residency at Park Avenue Armory in New York were hailed as "forceful" and "irresistible." At the 2012 World Shakespeare Festival in Stratford-upon-Avon, O'Neill played the title role in Roxana Silbert's production of Richard III at the Swan Theatre. In 2012 he won praise for his performance in Lucy Prebble's play The Effect at the Royal National Theatre headlining alongside Billie Piper, whom he later appeared alongside in the 2013 fiftieth anniversary episode of Doctor Who: "The Day of the Doctor". He also appeared in "The Mortal Remains," the final vignette in the Coen brothers's film The Ballad of Buster Scruggs (2018).



Donal Flynn
2022 • 9 episodes

2011 • 1 episode

Gary Tovey
2011 • 1 episode

Captain Kaido
2022 • 2 episodes

Edward Carver
2024 • 5 episodes

Replacement One
2001 • 1 episode

Robin Williamson
2020 • 3 episodes

Jeffrey Meadows
1992 • 2 episodes

Mr. Ganz
2020 • 1 episode

Aleister Crowley
2019 • 5 episodes

Gary Lester
2014 • 2 episodes

Julius Marsh
2021 • 2 episodes

Bernard Dior
2024 • 2 episodes

Seamus Dourke
2018 • 1 episode

Ciaran Donnelly
2015 • 11 episodes

Englishman (segment "The Mortal Remains")
2018

Johnny McEvoy
2001 • 1 episode

Ernst Pul
2022

Lazar
2008

Mark Hudson
2024 • 6 episodes