Signorelli was born in Brooklyn, New York. He made his film debut in 1963 on an episode of Wagon Train, then made his movie debut in The Beautiful, the Bloody, and the Bare in 1964. He appeared in films such as Dick Tracy, The Sicilian and The Cotton Club.
The Escape Artist
Mailbox Cop
Thief
Vincent Attaglia
Alice, Sweet Alice
Detective Brennan
Dominick and Eugene
Father T.
Silent Witness
Det. Pileggi
The St. Valentine's Day Massacre
Bobo Borotto
Big Bad Mama
Dodds
The Beautiful, the Bloody, and the Bare
Leo - the Artist
Hickey & Boggs
Nick
The Last Porno Flick
O.D.
Love or Money
DeMartino
Liberty
1st Hack
Hide in Plain Sight
Moriarity
One Down, Two to Go
Mario
The Seven-Ups
Minor Role (uncredited)
Death of a Salesman
Stanley
Bloodbrothers
Sig
The Anderson Tapes
Sync Man
The Sicilian
Abbot Manfredi
Sorcerer
Bystander (uncredited)
The Bride in Black
Ray D'Amore
Serpico
Bookmaker (uncredited)
The Pick-up Artist
Marty
Sleepers
Confessional Man
Kelly's Heroes
Bonsor
California Split
Nugie
Dick Tracy
Mike
Prizzi's Honor
Photographer #2
Bang the Drum Slowly
Goose
The Trip
Al
Fingers
Italian Prisoner
The Good Policeman
Love Affair
Cab Driver
Robot in the Family
Detective Goober
The First Deadly Sin
Carl Lucas