[2] Clarke was born in Hammersmith and grew up in Brackenbury Village, West London.
She made her film debut in the 2012 adaptation of the musical Les Misérables, performing the song "Lovely Ladies".
[6][7] Her first major role came out as Young Emmeline in James Kent's 2013 drama film The Thirteenth Tale alongside Olivia Colman and Sophie Turner.
[10] Clarke played Maria Feodorovna in the Sky Atlantic and HBO miniseries Catherine the Great.
She has stated her favourite books are To Kill A Mockingbird by Harper Lee and Just Kids by Patti Smith.