Reparto (por orden de créditos)
John Barrowman
Self - Judge
Barry Humphries
Graham Norton
Self - Presenter
Andrew Lloyd Webber
Self - Chief Judge
Denise Van Outen
Arthur Byrne
Self - Potential Oliver
Harry Stott
Jordan Li-Smith
Potential Oliver
Alexander Hockaday
Jessie Buckley
Self - Potential Nancy
Samantha Barks
Jodie Prenger
Rachel Tucker
Emrhys Cooper
Performer
Tara Bethan
Keisha Amponsa Banson
Niamh Perry
Francesca Jackson
Ashley Russell
Sarah Lark
Orig Williams
Self
Cleopatra Royer
Trave Ware
Amy Booth-Steel
Gwion Jones
Nancy Sullivan
Kerrie Southwart
Karl Schmid
Layton Williams
Daniel Boys
Self - Performer
Cameron Mackintosh
Self - Theatre Producer
Daniel Barber
Ben James-Ellis
Josh Fedrick
Trent Kowalik
Kirsty Davies
Mark Lester
Self - on screen contributoruncredited
Shani Wallis