Development The film was announced on May 8, 2024, with
Roland Joffé attached to direct from a screenplay by Nicholas Celozzi, nephew of mobster
Sam Giancana. Celozzi stated, "My family, my cousins, really got tired of people using our name, monetizing our name and telling a fake story." According to Celozzi, he got the story of the film when he was a child from Giancana's brother, Joseph "Pepe" Giancana, Celozzi's uncle.
Casting John Travolta,
Mandy Patinkin, and
Dermot Mulroney were announced as cast members on February 7, 2025.
Robert Carlyle and
Jefferson White were announced as cast members on April 7, 2025.
Filming Principal photography took place in
Winnipeg in July 2025.
Dealey Plaza, the site of the
assassination of John F. Kennedy, was reconstructed at
Birds Hill Provincial Park in southern
Manitoba. The film utilized 1,500 extras and over 75 period cars to portray the time period. ==Release==