Donnie Brasco is a 1997 film by Mike Newell, starring Al Pacino, Michael Madsen and Johnny Depp.
It is loosely based on the real-life events of Joseph D. Pistone, a Federal Bureau of Investigation (FBI) agent who successfully infiltrated the Bonanno crime family, one of the Mafia’s Five Families based in New York City during the 1970s, under the alias “Donnie Brasco”. Depp met with Pistone several times while preparing for his role.
The film was nominated for an Academy Award for Best Adapted Screenplay.