Earning her first Oscar nomination at the age of 13 for 'Atonement,' Ronan ranks among the youngest Academy Award nominees of all time.

Saoirse Una Ronan is an Irish and American actress. Primarily noted for her roles in period dramas since adolescence, Ronan has received several awards including a Golden Globe Award and nominations for four Academy Awards and five British Academy Film Awards.

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#SaoirseRonan ranks among the youngest #AcademyAward nominees of all time. Swipe to relive some of the star's most memorable roles. Which one is your favorite?

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Upon her nomination for Brooklyn, Ronan became the second-youngest actress to receive two Oscar nominations at the age of 21, the youngest being Angela Lansbury (Gaslight, The Picture of Dorian Gray). Upon her third nomination (Lady Bird), Ronan became the second-youngest actress to receive three Oscar nominations before the age of 24, the first being Jennifer Lawrence (Winter's Bone, Silver Linings Playbook (Win), American Hustle).