Thomasin Harcourt McKenzie (born 26 July 2000) is an actress from New Zealand. After a minor role in The Hobbit: The Battle of Five Armies, she rose to critical prominece with the lead role in Debra Granik's 2018 drama film Leave No Trace. After supporting roles in the 2019 films The King, Jojo Rabbit and True History of the Kelly Gang, as well as the 2021 thriller Old, Edgar Wright's psychological horror film Last Night in Soho established her as one of the industry's lead actresses.
Thomasin McKenzie has built a filmography of 11 credits over a career spanning from 2014 to 2025.
Thomasin McKenzie's most notable role to date came in The Hobbit: The Battle of the Five Armies (2014), where she played Astrid. She also appeared in Jojo Rabbit (2019) as Elsa. Most recently appeared in Old (2021) as Maddox Aged 16.
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