Julia Joyce
Julia Joyce (born 14 June 1998) is an actress, known for her appearance as a younger version of Billie Piper's characters in "Doctor Who" ("Father's Day"), as well as for roles in "Ruby in the Smoke" and "Mansfield Park". She is also the younger sister of the actress, model and Petits Filous advert star Lucy Joyce; Julia later went on to become the face of Petits Filous in her own right.