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
Ian Danby
Lieutenant
Harrison Muller Jr.
2nd Soldier
David Mills
Major
Joe Cortese
Ludovico 'Lodo' Varese
Gregory Snegoff
1st Soldier
Joe Spinell
Bride's Father
Pamela Prati
1st Roman Girl