On set of “Guys and Dolls,” Frank Sinatra and Marlon Brando pushed each other’s buttons. Sinatra called him “Mumbles” and Brando purposefully messed up his lines to force Sinatra to keep reshooting a scene wherein he had to eat cheesecake. Things continued to heat up. Close friend of Brando, Carlo Fiore, began to fear that Sinatra might “order his goons to beat up Marlon.” Fiore was onto something. After Sinatra’s estranged wife was seen in Brando’s dressing room (which added to Sinatra’s contempt for Brando), three men abducted Brando while he was out on his motorbike. Once they released him, Brando told Fiore that the men threatened to either kill him or castrate and cut his face (via Express).
Brando never accused Sinatra of sending the men to kidnap and threaten him, but Fiore always believed that Sinatra was behind the frightening ordeal, as he had threatened people in the past and clearly detested Brando (via Today Headline). For the rest of the “Guys and Dolls” filming, Brando hired a bodyguard, and though the film was a success, Closer Weekly explains that Sinatra and Brando never worked on another project together again.