Matthew Rhys as John / Johnny

Jodhi May as Blanche

Eileen Atkins as Lady Spence

Sheridan Smith as Nina

Andrew Scott as Paul

Phoebe Nicholls as Charlotte

Anton Lesser as Father McReady

Eloise Webb as Mary Lou

Pip Torrens as George

Ian Mercer as Fincher

Julian Wadham as Headmaster

Richard Ridings as Landlord