Caine 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 currently resides in London. 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 where she created the role of Cosette in Les Misérables. After a successful West End run, she joined the original cast of Phantom of the Opera to play Christine opposite Michael Crawford as alternate when original Christine Sarah Brightman left the show and was replaced by the original alternate, Claire Moore. When the rights to a Canadian production of Phantom were secured, producer Garth Drabinsky aggressively pursued Caine to reprise the role in Toronto. Andrew Lloyd Webber, who greatly admired Caine's portrayal of Christine in the London production, also strongly suggested she take the role. At the time, Caine was very close to signing a contract to star in another West End show. Ultimately, she chose Phantom and relocated to Toronto and also spent time in New York in early 1989 for principal cast rehearsals with director Hal Prince. The Canadian production of The Phantom of the Opera premiered on September 20, 1989, at the restored Pantages Theatre, with Susan Cuthbert playing Christine two performances per week as Caine's alternate. The show broke then box office records for advance ticket sales, and ran for just over ten years. During her run in Toronto, she joined the Canadian Opera Company to make her North American operatic debut in the title role of Alban Berg's Lulu. This led to offers from numerous international opera companies ranging from Claudio Monteverdi to Peter Maxwell Davies, including Pamina, Despina, Susanna, Aminta, Vixen, Michaela, Musetta, Ophelie, Leila, Marguerite, Violetta, Julietta and Adina for companies such as the Canadian Opera Company, Scottish Opera, English National Opera, Glimmerglass Opera, Spoleto Festival, Opéra de Nice, Vlaamse Opera, New Zealand Opera, National Theatre of Prague, and Opera North. In 2006 she performed as Hanna Glawari in Franz Lehár's The Merry Widow for Opera Holland Park in London in 2006. In 1996, Caine made a guest appearance on The Future Sound of London's album Dead Cities, performing operatic vocals on the song "Everyone in the World Is Doing Something Without Me". On October 7, 2006, Caine reunited with her former cast colleagues from the original London production of Les Misérables to sing "One Day More" after a performance in celebration of the show's 21st anniversary making it the longest running musical in the world. The original cast reunited again in 2010 to celebrate the show's 25th anniversary at the O2 Arena in London. In May 2009, Caine made her Chicago debut in the Chicago Opera Theater's production of Benjamin Britten's Owen Wingrave. In December 2010, Caine returned to the musical theatre stage as Lady Raeburn in Salad Days produced by Tête à Tête. In May 2011, Caine played Ottavia in a jazz adaptation of The Coronation of Poppea directed by Mark Ravenhill. In the summer of 2012, Caine played Baroness Elsa Schraeder in the Sound of Music at the Kilworth House Theatre in Leicestershire. The production also featured Helena Blackman as Maria and Jan Hartley as Mother Abbess. In March 2013, Caine played Lady Vale in Darling of the Day at the Union Theatre, London. Due to suffering from laryngitis on press night another actor had to sing-in for her, but she recovered to complete the rest of the run. From 27 November 2014 to 3 January 2015, Caine played Katisha in The Mikado at London's Charing Cross Theatre. In December 2015-February 2016, Caine joined the Asolo Repertory Theatre Company in Sarasota, Florida making her straight acting debut as Raquel De Angellis in 'Living On Love'. Caine continues to perform concerts and solo cabaret performances throughout Britain and North America, in addition to her work with opera and theatre companies. Caine also teaches at Trinity Laban Conservatoire of Music and Dance in Greenwich. Caine is due to appear at the Sheffield Crucible in the world première of the new musical Flowers for Mrs Harris in the role of Lady Dant/Mme. Colbert from 18 May to 4 June 2016.
''Leading Ladies''
In May 2007, Caine released Leading Ladies, a collection of songs paying tribute to past "Leading Ladies of the British Musical Theatre Stage", from Gertrude Lawrence to Julie Andrews, with her then-collaborator and vocal coach Gerald Martin Moore on piano and vocals, playing a selection of their leading men, including Noël Coward. They created two cabaret shows based on their Leading Ladies concept and have performed for sold old out crowds throughout the United Kingdom in venues such as the Jermyn Street Theatre in London and the Newbury Festival in Sydmonton.
World premieres
A notable interpreter of 20th century and contemporary opera, Caine's world premieres have included: Jezebel, presented by the Toronto Symphony ; Playing Away, presented by Opera North ; The Golden Ass, presented by the Canadian Opera Company ; Mr Emmet Takes a Walk, presented by Psappha ; Mathilde, a musical by Conor Mitchell directed by Simon Callow ; Intolerance, a one-woman opera by Mark Ravenhill and Conor Mitchell presented by Tête-à-Tête.
Recordings
Caine can be heard on numerous recordings including: Les Misérables ; The Phantom of The Opera ; Anything Goes ; Babes in Toyland; Mr Emmet Takes a Walk ; Leading Ladies.
Broadcasts
Caine's BBC broadcasts include: Candide; One Touch of Venus; Trouble in Tahiti; The Telephone; Concerts of Bernstein, Porter and Kern; Friday Night is Music Night.