Christopher Reeve

Father John Flaherty

Geneviève Bujold

Clara

Fernando Rey

Cardinal Santoni

Jason Miller

Don Vito Appolini

Adolfo Celi

Cardinal Vinci

Leonardo Cimino

The Pope

Tomas Milian

Father Francisco

Robert Prosky

Bishop Walkman

Joe Pantoliano

Pvt. Joe Musso

Milena Vukotić

Sister Verna

Harrison Muller Jr.

2nd Soldier

Joe Cortese

Ludovico 'Lodo' Varese

Gregory Snegoff

1st Soldier

Joe Spinell

Bride's Father

Ritza Brown

Maid of Honor

Yanti Somer

2nd Flaherty Secretary

Mimmo Poli

Sicilian Priest

Anny Papa

2nd Roman Girl

Stefania D'Amario

3rd Roman Girl

Elio Bonadonna

1st Killer

Giovanni Bonadonna

2nd Killer

Remo De Angelis

3rd Killer

Paolo Maria Scalondro

Clerical Secretary

Franco Angrisano

Priest in Confessional

Tom Felleghy

Priest

Alfonso Giganti

Cardinal

Amedeo Salamon

Cardinal

Lamberto Solfa

Cardinal

Paul Müller

Priest

Franca Scagnetti

Don Appolini's Maid