Rebecca Caine is a Canadian soprano, opera singer and musical theatre performer. She was born in Toronto, Ontario and studied at the Guildhall School of Music and Drama in London. She is the daughter of Australian statistician Geoffrey Watson and the granddaughter of British constitutional law scholar Sir William Ivor Jennings. Caine’s career has been divided between opera and musical theatre. She made her West End debut at the age of 19 in the role of Laurey in Oklahoma!. She then sang the role of Eliza in My Fair Lady on a national tour. While making her debut at Glyndebourne as Amor in L'incoronazione di Poppea, she was asked to join the Royal Shakespeare Company. Cosette in the original 1985 London cast of Les Misérables.