Was among those offered the role of Belloq in Raiders of the Lost Ark (1981).
His great passion is inventing. Among other things, he invented the moving, playing jacket Robin Williams was wearing in Toys (1992).
Has two children with his second wife.
Two sons: Lorenzo (1967) and actor Adriano Giannini (1971).
Has played a police officer for both director Ridley Scott (Hannibal (2001)) and his brother Tony Scott (Man on Fire (2004)).