Once Upon a Time in London  Once Upon a Time in London is a British crime film directed by Simon Rumley and written by Will Gilbey, Rumley and Terry Stone. The film is about the notorious gangsters Billy Hill and Jack Comer. The film stars Leo Gregory, Terry Stone, Holly Earl, Dominic Keating and Geoff Bell. It was released on 19 April 2019. Simon Rumley directed the film from a script he co-wrote with Will Gilbey and Terry Stone, while Stone would produce the film along with Richard Turner, and Tiernan Hanby would co-produce the film. Gateway Films is the production company behind the film along with Ratio Film Presentation. Principal photography on the film began on 3 April 2017 in and around London.