James Corden
Paul Potts
Acting
Alexandra Roach
Julz
Acting
Julie Walters
Yvonne
Acting
Colm Meaney
Roland Potts
Acting
Jemima Rooper
Hydrangea
Acting
Mackenzie Crook
Braddon
Acting
Trystan Gravelle
Matthew
Acting
Sion Tudor Owen
Choirmaster
Acting
Alex Macqueen
Dr. Thorpe
Acting
Miriam Lucia
Signora Fiorentino
Acting
Stanley Townsend
Luciano Pavarotti
Acting
Di Botcher
Nurse
Acting
Jon Wennington
Talent Show Punter (uncredited)
Acting
Roy Beck
Audience Member (uncredited)
Acting