Written by playwright Kevin Elyot (My Night With Reg), the BBC Wales production will also star former Doctor Who actors Lindsay Duncan (‘The Waters Of Mars’) and Toby Jones (‘Amy’s Choice’), alongside Imogen Poots (28 Weeks Later) and Douglas Booth (Worried About The Boy).

The story sees Isherwood (Matt Smith) escape repressive English society and his suffocating relationship with his mother, Kathleen (Lindsay Duncan) for the decadent – and politically unstable – world of 1930s Berlin.

Imogen Poots stars as Jean Ross, an aspiring actress and singer who provides Christopher with the inspiration for the Sally Bowles character of Cabaret fame, while Toby Jones plays Gerald Hamilton, a peculiar man who provides the inspiration for the title character in the celebrated Isherwood novel Mr Norris Changes Trains. Pip Carter (Party Animals) plays Wystan Auden, the famous poet with a droll sense of humour who persuades Christopher to join him in Berlin and Douglas Booth plays Heinz, an unassuming street cleaner who Christopher meets and falls in love with during his time in Berlin.

The 90-minute film is directed by Geoffrey Sax (Tipping The Velvet) and is currently filming on location in Belfast.