Saoirse Ronan (pronounced /ˈsɪərʃə ˈroʊnən/; born 12 April 1994) is an Irish actress. She is the eleventh youngest person to be nominated for an Academy Award and the seventh youngest to be nominated for Best Supporting Actress. Ronan received multiple award nominations for her role as the young Briony Tallis in the film Atonement. She played Susie Salmon in the 2009 film adaptation of the novel, The Lovely Bones (for which she received The Critics Choice Movie Award for "Best Young Actor/Actress"), and Lina Mayfleet in City of Ember.

Ronan, an only child, was born in New York City. She is the daughter of Irish parents Monica and Paul Ronan – the latter an actor – who were living in New York at the time. She was raised in County Carlow, Ireland, having moved to Ireland when she was three years old. As a small child, she sometimes accompanied her father on the set when he was working on such films as The Devil's Own and Veronica Guerin.

and lives in County Carlow.