"Chitty-Chitty-Bang-Bang" was loosely adapted as a 1968 film of the same name with a screenplay by Roald Dahl and Ken Hughes; a subsequent novelisation was also published. The film was produced by Albert R. Broccoli, co-producer of the James Bond film series. The story was also adapted as a stage musical under the same name. In April 2011 a BBC Radio 4 Extra adaptation was broadcast with Imogen Stubbs as the voice of Chitty. Three sequels to Fleming's book have been published, all written by Frank Cottrell-Boyce.