Sarah Ruth Snook (born 1 December 1987) is an Australian actress. She is best known for her starring role as Shiv Roy in the HBO drama series Succession (2018–2023), for which she won two Golden Globe Awards and a Primetime Emmy Award.

Snook received three AACTA Awards for her leading roles in the films Sisters of War (2010), Predestination (2014), and Memoir of a Snail (2024). She also appeared in the films Not Suitable for Children (2012), These Final Hours (2013), Jessabelle (2014), The Dressmaker (2015), Steve Jobs (2015), The Glass Castle (2017), An American Pickle (2020), Pieces of a Woman (2020), Run Rabbit Run (2023), and The Beanie Bubble (2023).