Sarah Snook was born in Adelaide, South Australia on December 1, 1987. Her first professional role was in the Australian medical drama All Saints in 2009. She is known for her roles in many films such as Not Suitable for Children, Predestination, The Glass Castle, Winchester, An American Pickle and Pieces of a Woman. 

She also starred in the drama series The Beautiful Lie, Black Mirror and Robot Chicken. Snook received her first award from the Australian Academy for Cinema and Television Arts (AACTA) for best lead actress in the television drama Sisters of War in 2012 and again in 2015 for Predestination. For her performance in Not Suitable for Children (2013), she won the best actress award from the Film Critics Circle of Australia. In 2018, she was cast as Shiv Roy in the HBO series Succession, a role for which she won two Golden Globe Awards and a Primetime Emmy Award. 

In 2025 she won the Laurence Olivier Award and the Tony Award for Best Lead Actress in a Play for starring in the West End and Broadway productions of The Picture of Dorian Gray. Recently, Sarah can be seen in Peacock miniseries All Her Fault.