Leian Paul Piper, known professionally as Billie Paul Piper, is an English singer, dancer and actress from Swindon, Wiltshire, England.
She made her debut in Scratchy & Co., and at the age of 15, she signed a recording contract and released her debut single "Because We Want To", which debuted at number one in the UK and made her the youngest artist ever to debut at number one.
Piper's transition into acting began in 2004. Her most famous role is as Rose Tyler, companion to The Doctor from 2005 to 2006, in the BBC sci-fi series Doctor Who, a role she reprised in 2008, 2010, and 2013. From 2007 until 2011, she starred as the high-flying escort Belle de Jour in the TV series Secret Diary of a Call Girl. She currently stars as Brona, an Irish immigrant, in the horror TV series Penny Dreadful.