Performances are presented June 21 from 11 AM-6 PM and June 22 from 12 noon-6 PM. There will also be a host of interactive displays and exhibits from London museums and other attractions.
Saturday will boast appearances from the companies of Jersey Boys, Into the Hoods, Wicked, The Lord of the Rings, Dirty Dancing, We Will Rock You, Never Forget, Grease, Chicago, Joseph and the Amazing Technicolor Dreamcoat, Mamma Mia!, Buddy, Avenue Q, High School Musical and Stomp.
Sunday will see appearances from The 39 Steps, Stomp, Jersey Boys, Mamma Mia!, All Bob's Women, Brief Encounter and Dickens Umplugged.
Amongst other companies appearing over the weekend will be the National Youth Music Theatre, Shakespeare's Globe with the King Lear band, performers from the Syliva Young Theatre School and the London Gay Men's Chorus.
Visit www.westendlive.co.uk for more information.