Al Pacino's performance as Sonny in the film is said to be his one of his finest ever. According to the Life magazine, it is ranked at number 4 of all time great performances.
Pacino's dialog 'Attica Attica' achieved a sort of cult status.
Sonny's gay lover managed to have the sex change surgery, and became a woman. He died of Aids in 1987. Sonny was convicted for 20 years in jail, out of which he served only seven when he was released. He got USD 2500 & 1% share of the profits