Sarah Snook (born 28 July 1987) is an Australian actress. She is known for her roles in the films Sisters of War (2010), Not Suitable for Children (2012), These Final Hours (2013), Predestination (2014), The Dressmaker (2015), and Steve Jobs (2015). For Predestination, she won the AACTA Award for Best Actress in a Leading Role. In 2018, she began starring in the HBO drama series Succession as Siobhan "Shiv" Roy.
Snook was born in Adelaide, Australia and grew up in a house on Shepherds Hill Road, Eden Hills. She attended St John's Grammar School (Belair) and Scotch College (Torrens Park), and graduated from the National Institute of Dramatic Art (Sydney) in 2008.
While at NIDA, Snook performed in stage productions of Macbeth and Gallipoli. She subsequently appeared in King Lear with the State Theatre Company of South Australia and as Saint Joan in the Sydney Theatre Company's production in 2018.