Billie Paul Piper (born Lianne Paul Piperon 22 September 1982) is an English singer and actress.
She began her career as a pop singer in her teens but is now best known for portraying Rose Tyler, companion to the Doctor in the television series Doctor Who from 2005 to 2006, a role she reprised in 2008. In 2007, Broadcast magazine listed Piper at #6 in its "Hot 100" list of influential on-screen performers, the top woman on the list. She is now portraying Belle de Jour in Secret Diary of a Call Girl.
On April 25, 1983, her name was officially changed to Billie Paul Piper by her parents, Paul Victor Piper and Mandy Kane Kent.