Killian is originally from Meath, Ireland.
Theatre includes: Tony in Billy Elliot the Musical (Victoria Palace Theatre); Raoul in The Phantom of the Opera (Her Majesty's Theatre); Enjolras in Les Misérables (Queen's Theatre), before which he understudied and played the roles of Jean Valjean and Javert, Collins in Michael Collins (Cork Opera House); Sweeney Todd (Gate Theatre, Dublin); Ethan Girard in The Full Monty (Olympia Theatre); Tony in West Side Story (The Solstice); Declan in The Wireman (Gaiety Theatre) and Rod in Singin' in the Rain (Olympia Theatre).
Workshops include: Pink in The Wall directed by Simon McBurney and Deco in The Commitments.
Concerts include: The Phantom of the Opera 25th Anniversary (Royal Albert Hall); Courfeyrac in Les Misérables 25th Anniversary (O2 Arena); You Should Be Dancing (National Concert Hall, Dublin) and Les Misérables (Bournemouth Symphony Orchestra, Isle of Wight).
Television includes: Showbands (BBC); The Last Furlong (RTE); Batchelors Walk (RTE); The Tudors (BBC); The Late Late Show (RTE) and Open House (RTE).
Film includes: Combeferre in Les Misérables (Working Title Films) directed by Tom Hooper.
Other credits include: Les Misérables Chorus in The 85th Academy Awards (Dolby Theatre, Los Angeles).
Most recently: Deco in The Commitments (Palace) directed by Jamie Lloyd.
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