John Barrowman, who starred in the West End and Broadway runs of Lloyd Webber's Sunset Boulevard (in which he took over the role of Joe Gillis) as well as in the West End production of The Phantom of the Opera (in which he played Raoul), hosts the 6 PM event.

The concert features performances by Jonathan Ansell (formerly of pop-opera boyband G4), Steve Balsamo (Jesus Christ Superstar in the West End and Broadway), Dean Collinson (Pharoah in the current production of Joseph and the Amazing Technioclor Dreamcoat), Jason Donovan (who headlined the London Palladium revival of Joseph and the Amazing Technicolor Dreamcoat in 1991), Connie Fisher (Maria in The Sound of Music, produced by Lloyd Webber at the London Palladium, and currently in They're Playing Our Song at the Menier Chocolate Factory), Maria Friedman (original London and Broadway cast of Lloyd Webber's The Woman in White), Duncan James (Chicago in the West End), Lee Mead (currently playing the title role in Joseph and the Amazing Technicolor Dreamcoat), Idina Menzel (Wicked in the West End and Broadway), Denise van Outen (Chicago in the West End and on Broadway, Tell Me On a Sunday in the West End), Elaine Paige (original Eva Peron in Lloyd Webber's Evita and original Grizabella in Cats, who also took over as Norma Desmond in Sunset Boulevard in the West End and on Broadway), Jodie Prenger (winner of the "I'd Do Anything" reality TV contest to play Nancy in the Theatre Royal, Drury Lane production of Oliver!, opening in December), Rhydian ("X-Factor"), Joss Stone, Julian Lloyd Webber (the composer's brother and a classical cello player) and classical soloist Hayley Westenra. Also appearing are the 100-voice Crouch End Festival Chorus, Capital Voices, harmonica player Philip Achille, and chorister Andrew Johnston. They will be accompanied by the 70-piece BBC Concert Orchestra, with Mike Dixon as musical director.

Also appearing from BBC1's "I’d Do Anything" and "Any Dream Will Do" star searches, which Lloyd Webber judged, are Keisha Amposa Banson, Daniel Boys, Lewis Bradley, Jessie Buckley, Ben James Ellis,Keith Jack, Niamh Perry and Rachel Tucker.

The evening's repertoire is set to include the following songs: "Jesus Christ Superstar," "I Don't Know How To Love Him," "Another Suitcase in Another Hall," "Don't Cry for Me Argentina," "Memory," "Pie Jesu," "Music of the Night," "All I Ask of You," "Love Changes Everything," "No Matter What," "As If We Never Said Goodbye" and "Any Dream Will Do."

The concert, for which tickets are £25, will close with a fireworks finale. The evening will be recorded and subsequently broadcast on Radio 2's "Friday Night Is Music Night" on Oct. 10.