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
As Mailbox Cop
Thief
As Vincent Attaglia
Alice, Sweet Alice
As Detective Brennan
Dominick and Eugene
As Father T.
Silent Witness
As Det. Pileggi
The St. Valentine's Day Massacre
As Bobo Borotto
Big Bad Mama
As Dodds
The Beautiful, the Bloody, and the Bare
As Leo - the Artist
Hickey & Boggs
As Nick
The Last Porno Flick
As O.D.
Love or Money
As DeMartino
The 10 Million Dollar Getaway
As Flatlands Tony
Liberty
As 1st Hack
Hide in Plain Sight
As Moriarity
One Down, Two to Go
As Mario
The Seven-Ups
As Minor Role (uncredited)
Crossover Dreams
As Lou Rose
Death of a Salesman
As Stanley
Bloodbrothers
As Sig
The Anderson Tapes
As Sync Man
The Sicilian
As Abbot Manfredi
Sorcerer
As Bystander (uncredited)
The Bride in Black
As Ray D'Amore
Serpico
As Bookmaker (uncredited)
The Pick-up Artist
As Marty
Sleepers
As Confessional Man
Kelly's Heroes
As Bonsor
California Split
As Nugie
Dick Tracy
As Mike
Prizzi's Honor
As Photographer #2
Bang the Drum Slowly
As Goose
The Trip
As Al
Fingers
As Italian Prisoner
The Good Policeman
Love Affair
As Cab Driver
Robot in the Family
As Detective Goober
The Fugitive
As Mechanic
Law & Order
As Anthony Holland
Columbo
As Doctor
The Equalizer
As Frankie Corso
Leg Work
As Logan