Billie Boullet was born in London but moved to Paris as a baby, returning to the UK in 2014. She appeared in the Disney+ TV series A Small Light, where she played the role of Anne Frank, for which she was nominated for best supporting actress in a limited series by the Critics choice awards 2024. She also previously appeared in the CBBC series The Worst Witch. Billie is a fluent speaker of both French and Norwegian. She is set to star in Netflix’s Man on Fire, in 2026.