About Julia Joyce
American actress known for playing a young Billie Piper in the Doctor Who episode Father's Day. She has had other television appearances in the series Casualty, Waking the Dead, and Torchwood.
She made her debut in 2003 in the series Prime Suspect 6: The Last Witness.
She portrayed a young Billie Piper in Mansfield Park and The Ruby in the Smoke as well.
She has an older sister who is also an actress named Lucy Joyce.
She had a role in the 2008 film Speed Racer which starred Matthew Fox in a supporting role.