The 58-year-old Umbrian actor plays the 'consigliere' of a clan engaged in a bitter turf war with a rival.
Shot in Italy with an almost all-Italian cast and crew, Bellucci said despite her having filmed many movies in her home country, this one felt a little different.
"It was fun! We filmed between Rome and Bracciano, I hadn't done many comedies in my life so it was a new experience," the former Bond girl and Matrix star said.
Hardwicke said it was a no brainer that they sign Bellucci for the role.
"Monica was the only person we approached to play Bianca," she said.
"It was phenomenal to set her energy and sense of humour against Toni's.”
In the film, Colette's second with Hardwicke after Miss You Already, the 50-year-old Australian star of Muriel's Wedding and Knives Out plays an American woman parachuted into leading a crime family after its head, her grandfather, dies.
"She suddenly finds herself in a world she knows nothing about,” Collette said at the New York premiere.
“She's a fish totally out of water and full of good intentions, but she finds her autonomy in this world.”
ANSA