Susan Boyle has joined the cast of a musical based on her life. The Scottish singing sensation is the focus of touring stage production 'I Dreamed A Dream and while actress Elaine C. Smith will portray her journey from struggling recluse to global stardom after appearing on 'Britains Got Talent in 2009, the 'Wild Horses hitmaker will take to the stage for the finale of the show. Susan - who has not performed on the UK stage since the 'Britains Got Talent tour - said: I am thrilled to be a part of the musical about my life story and very much looking forward to stepping on stage and performing with the cast. EPS