Highlights will include turns from talk-show host Jerry Springer, making his West End debut as razzmatazz lawyer Billy Flynn in Chicago in June, and the BBC's I'd Do Anything winner-turned-Oliver! star Jodie Prenger.
They'll share the giant open-air stage with performers from Hairspray, La Cage aux Folles, Carousel, Avenue Q, Dirty Dancing, Jersey Boys, Priscilla, Queen of the Desert, Sister Act, Thriller - Live, We Will Rock You, Wicked, Stomp and other productions, all cheered on by more than 150,000 visitors expected to attend the festivities.
The event is organized by Westminster City Council and supported by the Society of London Theatre. The two-day event also features street entertainment, live broadcasts, arts workshops and interactive exhibitions from some of London's top museums and tourist attractions, and additional performances from So Jest End, the Players' Theatre, the Sylvia Young Theatre School, London Gay Men's Chorus, Tom Tom Crew, and many others.For more information, visit www.whatsonstage.com and www.westendlive.co.uk.