Elaine Cassidy (born 31 December 1979) is an Irish actress.
She is best known for playing the lead character Abby Mills in the American CBS TV series Harper’s Island, Felicia in Felicia’s Journey, Runt in Disco Pigs, Lydia in The Others, Katherine Glendenning in The Paradise, and DC Dinah Kowalska in No Offence.
In 1996, Cassidy was nominated for the Most Promising Actress at the Geneva Film Festival for her role in The Sun, the Moon and the Stars. She played the starring role in Felicia’s Journey, for which she was nominated Best Actress at the 20th Genie Awards. She has won 2 Irish Film and Television Awards (IFTA) for Best Actress in a Lead Role in Film in 2003 for her role as Runt in Disco Pigs, and in 2010 for Best Actress in a Lead Role in Television for her role as Abby Mills in the American CBS TV series Harper’s Island. She was also nominated for an IFTA in 2005 as Best Actress in a Lead Role in Television for her role as “Maud Lilly” in the BBC BAFTA nominated drama Fingersmith, in 2007 as Best Actress in a Supporting Role in Film for her role as Sandra in And When Did You Last See Your Father?, and in 2009 as Best Actress in a Lead Role in Television for her role as Annie Mulcahy in Little White Lie.
She is also a stage actress, appearing in The Lieutenant of Inishmore (2002) and The Crucible (2006) with the Royal Shakespeare Company and in There Came A Gypsy Riding at the Almeida Theatre in 2007. She appeared in the music video for Coldplay’s “The Scientist”. She plays DC Dinah Kowalska in No Offence.