Henley was born on 9 July 1995, to Helen and Mike Henley, and has two older sisters, Rachael and Laura. Rachael played the older version of Lucy Pevensie in "The Lion, the Witch and the Wardrobe". Henley now lives in Ilkley, West Yorkshire, and attends Bradford Grammar School, where she is a member of the Ilkley Upstagers' Theatre Group