Geoffrey Sax Director Matt Smith Christopher Isherwood Actor Imogen Poots Jean Ross Actor Lindsay Duncan Kathleen Isherwood Actor Perry Millward Richard Isherwood Actor Toby Jones Gerald Hamilton Actor Pip Carter W. H. Auden Actor Issy Van Randwyck Frl. Thurau Actor Margaret Hayes Frl. Mayr Actor Iddo Goldberg Wilfrid Landauer Actor Will Kemp Bobby Gilbert Actor Tom Wlaschiha Gerhardt Neddermayer Actor Alexander Doetsch Caspar Actor Faolan Morgan Pieps Actor Clare Louise Connolly Frl. Schmidt Actor Douglas Booth Heinz Neddermayer Actor Gertrude Thoma Fr. Neddermayer Actor Kevin Elyot Screenwriter, Executive Producer Michele Buck Executive Producer Rebecca Keane Executive Producer Damien Timmer Executive Producer Eleanor Moran Executive Producer Dominik Scherrer Original Music Kieran McGuigan Cinematographer Paul Knight Film Editing Suzie Davies Production Design Gillian Devenney Art Director Sophie Phillips Set Decoration