Production
The British television series Peaky Blinders ran for six series between 2013 and 2022. Speaking in January 2021, show creator Steven Knight discussed the future of the Peaky Blinders storytelling ahead of the conclusion of the sixth series and suggested a feature-length film could be produced as a continuation of the story.
Speaking to Rolling Stone magazine in May 2023, actor Cillian Murphy, who played lead character Tommy Shelby in all six series, indicated a willingness to return to the character, saying "If there's more story there, I'd love to do it. But it has to be right. Steve Knight wrote 36 hours of television, and we left on such a high. I'm really proud of that last series. So, it would have to feel legitimate and justified to do more". In December 2023, Knight confirmed that he was finalising the script for the film.
In March 2024, Knight confirmed that Murphy would be returning for the film to reprise his role as Shelby. Principal photography was expected to commence in September 2024, in Digbeth at Knight's Digbeth Loc Studios. Producers on the film are Knight, Caryn Mandabach, Murphy, and Guy Heeley. In July 2024, Rebecca Ferguson joined the cast. In August, Barry Keoghan joined the cast, with Netflix handling the distribution. Murphy, who has previously worked with Keoghan on Dunkirk, was instrumental in casting Keoghan - ultimately text messaging him an offer to play a part. In September, Tim Roth and Jay Lycurgo joined the cast. By October, Stephen Graham, Sophie Rundle, Ned Dennehy, Packy Lee, and Ian Peck were reported to be reprising their roles from the series.
Reports in September 2024 suggested that filming would take place in October 2024 in St Helens, Merseyside with the title set to be The Immortal Man.
Principal photography began on 30 September 2024 at Digbeth Loc Studios in Birmingham, and in the West Midlands. The filming in St Helens took place at the former Pilkington Watson Street works. Filming wrapped on 13 December. A climatic fight scene between Murphy and Keoghan was shot on location in mud contaminated with pig feces; it was shot with Keoghan holding his own more in the fight and gaining the upper-hand at one moment but that was removed in the edit.