On film and television he has starred in Somewhere Boy, The Duchess, Birdsong, Versailles, War & Peace, The Guard and Peaky Blinders.
Keenan has performed in many National Theatre productions,[1] as well as at BAM, New York and Wyndhams Theatre in the West End as Jamie in Long Day's Journey into Night, directed by Sir Richard Eyre.
[2] Previous work at The Royal National Theatre includes The Kitchen, Damned By Despair and Liola, and Philadelphia, Here I Come!
[1] He has performed many leading roles in Ireland, having worked from an early age at The Abbey Theatre, as well as the title roles in Hamlet and Macbeth, the latter of which landed him Best Actor at 11th The Irish Times Irish Theatre Awards.
[5] On television he was seen in Channel 4's Somewhere Boy, Netflix's The Duchess, BBC's Versailles, War & Peace and Peaky Blinders.