- Marcello Mastroianni
- Marcello Rubini
- Anita Ekberg
- Sylvia
- Anouk Aimée
- Maddalena
- Yvonne Furneaux
- Emma
- Magali Noël
- Fanny
- Alain Cuny
- Steiner
- Annibale Ninchi
- Il padre di Marcello
- Walter Santesso
- Paparazzo
- Valeria Ciangottini
- Paola
- Riccardo Garrone
- Riccardo
- Ida Galli
- Irene
- Audrey McDonald
- Jane
- Polidor
- Pagliaccio
- Alain Dijon
- Frankie Stout
- Mino Doro
- Amante di Nadia
- Giulio Girola
- Lucenti - il commissario di polizia
- Laura Betti
- Laura
- Nico
- Nico
- Carlo Musto
- Travestito
- Enzo Cerusico
- Fotografo
- Giulio Paradisi
- Fotografo
- Enzo Doria
- Fotografo
- Enrico Glori
- Ammiratore di Nadia
- Adriana Moneta
- Ninni - la prostituta
- Massimo Busetti
- Bimbo del miracolo
- Lex Barker
- Robert - marito di Sylvia
- Jacques Sernas
- Il divo
- Nadia Gray
- Nadia
- Giuseppe Addobbati
- (uncredited)
- Conte Brunoro Serego Aligheri
- Young Man with Mink Coat
- Gabriella Andreini
- Woman at Nadia's Party
- Federika André
- Tenant in Steiner's House
- Armando Annuale
- Old sleeping man at the miracle
- Joan Antequera
- Woman at Castle
- Juan Antequero
- Spanish Gentleman with Eyepatch at Castle
- Gianni Baghino
- (uncredited)
- Nadia Balabine
- Reporter at the Press Conference
- Ignazio Balsamo
- (uncredited)
- Remo Benedetti
- (uncredited)
- Andrea Bianchi
- Man at Nadia's Party
- Lars Bloch
- Party Guest
- Angelo Boscariol
- Police Door Guard
- Leonardo Botta
- Doctor
- Ida Bracci Dorati
- (uncredited)
- Ferdinando Brofferio
- Maddalena's Lover
- Walter Brofferio
- Maddalenas Lover
- Giovanna Busetti
- Lying Child of The Miracle
- Tito Buzzo
- Muscle Man
- Daniela Calvino
- Daniela - Laura's Friend
- Tony Campanino
- Man at Nightclub
- Fabrizio Capucci
- Photographer at Press Conference
- Donato Castellaneta
- Reporter at the Press Conference
- Lucia Cavalieri
- Old Woman by the Miracle Tree
- Bruna Cealti
- ?
- Adriano Celentano
- Rock'n'Roll Singer
- Calogero Chiarenza
- Man in the Crowd at the Miracle
- Elisabetta Cini
- Sleeping Duchess
- Giulio Citti
- Man at Nightclub
- Leo Coleman
- Negro Dancer
- Nani Colombo
- Woman at the Mirror
- Mario Conocchia
- Lawyer with Nadia's Bra
- Francesco Consalvo
- Scalise's Assistant
- Tiziano Cortini
- Movie News Cameraman
- Decimo Cristiani
- Young Man That Doesn't Talk
- Mario De Grenet
- Man at Castle That Dislikes Dog's Smell
- Andrea De Pino
- (uncredited)
- Adele De Rossi
- (uncredited)
- Donatella Della Nora
- Reporter at the Press Conference
- Christine Denise
- Woman Eating a Chicken
- Katherine Denise
- (uncredited)
- Carlo Di Maggio
- Toto Scalise - Movie Producer
- François Dieudonné
- Reporter at the Press Conference
- Venceslao Dobrzensky
- Giovanni
- Domino
- Transvestite
- Vera Drudi
- Woman by the Miracle Tree
- Emma Druetti
- Night Club Customer
- Donatella Esparmer
- Lady with the Irritated Man
- Paolo Fadda
- Assistant Police Inspector
- Umberto Felici
- Reporter at the Press Conference
- Oretta Fiume
- Lisa
- Iolanda Fortini
- Woman near the Miracle Tree
- Rina Franchetti
- Mother of the Miracle Children
- Giacomo Gabrielli
- Maddalena's Father
- Franco Giacobini
- Journalist at the Telephone
- Angela Giavalisco
- Woman at Airport
- Veriano Ginesi
- Man in the Crowd at the Miracle
- Romolo Giordani
- Man at Castle
- Christine Graefeck
- (uncredited)
- Lily Granado
- Lucy
- Libero Grandi
- (uncredited)
- Maurizio Guelfi
- Reporter
- Gloria Hendy
- Woman in Via Veneto
- Janine Hendy
- Woman in Via Veneto
- April Hennessy
- Woman in Via Veneto
- Nina Hohenlohe-Oehringen
- Woman at Castle
- Gloria Jones
- Gloria
- Carlo Kechler
- Man with Clock
- Edward Febo Kelleng
- Party Guest
- Else Knorr
- (uncredited)
- Paolo Labia
- Servant in Maddalena's Household
- John Francis Lane
- Reporter at the Press Conference
- Nancy Lecchini
- Party Guest
- Sondra Lee
- Ballerina in Spoleto
- Marianne Leibl
- Yvonne's Companion in Miracle Sequence
- Guglielmo Leoncini
- Scalise's Secretary
- Giuliana Lojodice
- Servant at Steiner's House
- Renée Longarini
- Mrs. Steiner
- Francisco Lori
- Man in Miracle Sequence
- Francesco Luzi
- Radioreporter
- Mario Mallarno
- Reporter at the Press Conference
- Renato Mambor
- A Tall Young Man
- Vittorio Manfrino
- Tabarin Director
- Maria Marigliano
- Massamilla
- Carlo Mariotti
- Male Nurse
- Gino Marturano
- Pimp
- Maria Mazzanti
- Woman at Airport
- Harriet Medin
- Sylvia's Secretary
- Marta Melocco
- (uncredited)
- Nello Meniconi
- Man on Via Veneto
- Alex Messoyedoff
- Priest at the Miracle Site
- Gianfranco Mingozzi
- Priest in Church with Organ
- Lucia Modigliani
- (uncredited)
- Maite Morand
- Reporter at the Press Conference
- Aurelio Nardi
- Uncle of Lying Children of The Miracle
- Rio Nobile
- Night Club Customer
- Desmond O'Grady
- Steiner's Guest
- Liana Orfei
- (uncredited)
- Umberto Orsini
- Man in Sunglasses Who Helps Nadia Strip
- Contessa Cristina Paolozzi
- Laughing Girl at Seance
- Ada Passeri
- Woman in Miracle Sequence
- Franca Pasut
- Girl Covered with Feathers
- Loretta Pepi
- (uncredited)
- Paola Petrini
- (uncredited)
- Cesarino Miceli Picardi
- Irate Man in Nightclub
- Princess Doris Pignatelli
- Lady in White Coat at Castle
- Alberto Plebani
- Doctor
- Oliviero Prunas
- The Middle Prince Malsachi
- Giovanni Querrel
- Man at Nightclub
- Giulio Questi
- Don Giulio Mascalchi
- Concetta Ragusa
- Reporter at the Press Conference
- Loretta Ramaciotti
- Woman in Seance
- Leonida Repaci
- Steiner's Guest
- Alfredo Rizzo
- Television Director
- Rosemary Rennel Rodd
- English Medium
- Giancarlo Romani
- Policeman
- Franco Rossellini
- The Beautiful Horseman
- Prince Eugenio Ruspoli di Poggio Suasa
- Don Eugenio Mascalchi - The Old Prince
- Margherita Russo
- Steiner's Guest
- Anna Maria Salerno
- Prostitute's Friend
- Anna Salvatore
- Steiner's Guest
- Archie Savage
- Negro Dancer
- Lisa Schneider
- Woman in Miracle Sequence
- Maria Pia Serafini
- Second Lady with the Irritated Man
- Noel Sheldon
- Man in Via Veneto
- Isabella Soldani
- (uncredited)
- Letizia Spadini
- Steiner's Guest
- Giò Stajano
- Pierone - The Blonde Homosexual
- Gino Talamo
- (uncredited)
- Sandra Tesi
- Young Girl Living Nearby
- Henry Thody
- Reporter at the Press Conference
- Marta Timar
- ?
- Giulio Tomei
- Night Club Customer
- Tomás Torres
- Gianelli
- Iris Tree
- Poetess at Steiner's Party
- Vando Tress
- Police Inspector
- Gondrano Trucchi
- Servant at Caracalla's
- Teresa Tsao
- Woman in Nightclub
- Winie Vagliani
- The Lady Who sings at Steiner's
- Leontine Van Strein
- Matinee Idol's Girl Friend
- Aldo Vasco
- Man in Miracle Sequence
- Lucia Vasilicò
- Young Woman Making Confession at Nadia's Party
- Maria Teresa Vianello
- Woman at Airport
- Alessandro von Norman
- Interpreter at the Press Conference
- Irina Wassilchikoff
- Woman Waving at the Helicopter
- Antoinette Weynen
- (uncredited)
- Angela Wilson
- Woman in Via Veneto
- Vadim Wolkonsky
- The Young Prince Mascalchi
- Maria Teresa Wolodimeroff
- The Bored Lady
- Gianni Zamputo
- Man at Nadia's Party
- Italo Zingarelli
- (uncredited)
