Giannini was born in La Spezia and he spent most of his childhood in the settlement of Pitelli.

He has been the official Italian dubber of Al Pacino since 1975, and has also dubbed Jack Nicholson, Michael Douglas, and Helmut Berger. He is also a dubbing artist, contributing voice work to the Italian-language versions of dozens of films since the 1960s. His other films include The Innocent (1976), Lili Marleen (1980), New York Stories (1990), A Walk in the Clouds (1995), Hannibal (2001), Man on Fire (2004), and the James Bond films Casino Royale (2006) and Quantum of Solace (2008). He rose to international stardom through Wertmüller's The Seduction of Mimi (1972), Love and Anarchy (1973), Swept Away (1974), culminating in his Oscar-nominated turn in Seven Beauties (1975). After appearing predominantly on television throughout the early 1960s, he had his first lead role in a film in Rita the Mosquito (1965), the first of many collaborations with filmmaker Lina Wertmüller. Giannini began his career on stage, starring in Franco Zeffirelli's productions of Romeo and Juliet and A Midsummer Night's Dream.

He is also a four-time recipient of the David di Donatello Award for Best Actor. He won the Cannes Film Festival Award for Best Actor for his performance in Love and Anarchy (1973) and received an Academy Award nomination for Seven Beauties (1975). Giancarlo Giannini (born 1 August 1942) is an Italian actor and voice actor.

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