Sinead Keenan is an Irish actress with a wide range of television, film and stage credits. Keenan is best known to Irish viewers for playing Farrah Phelan in Fair City and is best known to UK viewers for playing the role of werewolf Nina Pickering on BBC Three's supernatural drama Being Human, which began airing in 2009. Keenan has been a regular cast member since Series 3 began airing in 2011. In November 2011, Keenan's on-screen partner, Russell Tovey announced he would be leaving Being Human to work full-time on his BBC Three sitcom, Him & Her. On 9 January 2012, it was announced by show creator Toby Whithouse and confirmed by Keenan on Twitter that she would not be appearing in the fourth series of the supernatural drama.
Keenan is the eldest of three children. Her younger brother and sister, Rory and Grainne, are also actors.
She grew up in Dublin, Ireland. She attended University College Dublin and has a degree in Sociology and History. As a child, Keenan says she wanted to be a lawyer because she loved the US legal drama, Matlock, but as she got older she realised that she actually just wanted to play the part of the lawyer, not be one.
Keenan's first role was in 1999, when she was cast as the teenage girlfriend of Cillian Murphy in the film, Sunburn. After this, she played the character Farrah Phelan in Irish soap opera Fair City for a year. Keenan has stated she would return to Fair City, as another character.
Keenan left Fair City amid fears of becoming type-cast, and moved on to film the movie On the Nose with Cracker actor Robbie Coltrane. Her next television role was as Lisa Cassidy in short-lived Irish sitcom The Cassidys.