Marcello Mastroianni as Marcello Rubini

Anita Ekberg as Sylvia

Anouk Aimée as Maddalena

Yvonne Furneaux as Emma

Magali Noël as Fanny

Alain Cuny as Steiner

Annibale Ninchi as Marcello's father

Walter Santesso as Paparazzo

Valeria Ciangottini as Paola

Riccardo Garrone as Riccardo

Ida Galli as Debutante of the year

Audrey McDonald as Jane

Polidor as Pagliaccio

Alain Dijon as Frankie Stout

Mino Doro as Lover of Nadia

Giulio Girola as Police commissioner

Laura Betti as Laura

Nico as Nico

Domino as

Carlo Musto as Transvestite

Enzo Cerusico as Photographer

Giulio Paradisi as Photographer

Enzo Doria as Photographer

Enrico Glori as Admirer of Nadia

Adriana Moneta as Ninni

Massimo Busetti as Miracle child

Lex Barker as Robert - Sylvia's husband

Jacques Sernas as The star

Nadia Gray as Nadia

Giuseppe Addobbati as (uncredited)

Conte Brunoro Serego Aligheri as Young Man with Mink Coat (uncredited)

Gabriella Andreini as Woman at Nadia's Party (uncredited)

Federika André as Tenant in Steiner's House (uncredited)

Armando Annuale as (uncredited)

Joan Antequera as Woman at Castle (uncredited)

Juan Antequero as Spanish Gentleman with Eyepatch at Castle (uncredited)

Gianni Baghino as (uncredited)

Nadia Balabine as Reporter (uncredited)

Ignazio Balsamo as (uncredited)

Remo Benedetti as (uncredited)

Andrea Bianchi as Man at Nadia's Party (uncredited)

Lars Bloch as Party Guest (uncredited)

Leonardo Botta as Doctor (uncredited)

Ida Bracci Dorati as (uncredited)

Ferdinando Brofferio as Maddalena's Lover (uncredited)

Giovanna Busetti as Lying Child of The Miracle (uncredited)

Tito Buzzo as Muscle Man (uncredited)

Daniela Calvino as Daniela (uncredited)

Tony Campanino as Man at Nightclub (uncredited)

Fabrizio Capucci as Photographer at Press Conference (uncredited)

Donato Castellaneta as Reporter (uncredited)

Adriano Celentano as Self (uncredited)

Elisabetta Cini as Sleeping Duchess (uncredited)

Giulio Citti as Man at Nightclub (uncredited)

Leo Coleman as Negro Dancer (uncredited)

Nani Colombo as Woman at the Mirror (uncredited)

Mario Conocchia as Lawyer with Nadia's Bra (uncredited)

Francesco Consalvo as Scalise's Assistant (uncredited)

Tiziano Cortini as Movie News Cameraman (uncredited)

Decimo Cristiani as Young Man That Doesn't Talk (uncredited)

Mario De Grenet as Man at Castle That Dislikes Dog's Smell (uncredited)

Andrea De Pino as (uncredited)

Adele De Rossi as (uncredited)

Donatella Della Nora as Reporter (uncredited)

Christine Denise as Woman Eating a Chicken (uncredited)

Katherine Denise as (uncredited)

Carlo Di Maggio as Toto Scalise (uncredited)

François Dieudonné as Reporter (uncredited)

Venceslao Dobrzensky as Giovanni (uncredited)

Donatella Esparmer as Lady with the Irritated Man (uncredited)

Paolo Fadda as Assistant Police Inspector (uncredited)

Umberto Felici as Reporter (uncredited)

Oretta Fiume as Lisa (uncredited)

Rina Franchetti as Mother of the Miracle Children (uncredited)

Giacomo Gabrielli as Maddalena's Father (uncredited)

Franco Giacobini as Journalist at the Telephone (uncredited)

Angela Giavalisco as Woman at Airport (uncredited)

Romolo Giordani as Man at Castle (uncredited)

Christine Graefeck as (uncredited)

Lily Granado as Lucy (uncredited)

Libero Grandi as (uncredited)

Maurizio Guelfi as Reporter (uncredited)

Gloria Hendy as Woman in Via Veneto (uncredited)

April Hennessy as Woman in Via Veneto (uncredited)

Nina Hohenlohe as Woman at Castle (uncredited)

Antonio Jacono as Transvestite (uncredited)

Gloria Jones as Gloria (uncredited)

Carlo Kechler as Man with Clock (uncredited)

Else Knorr as (uncredited)

Paolo Labia as Servant in Maddalena's Household (uncredited)

John Francis Lane as Reporter (uncredited)

Sondra Lee as Ballerina in Spoleto (uncredited)

Marianne Leibl as Yvonne's Companion in Miracle Sequence (uncredited)

Guglielmo Leoncini as Scalise's Secretary (uncredited)

Giuliana Lojodice as Servant at Steiner's House (uncredited)

Renée Longarini as Miss Steiner (uncredited)

Francisco Lori as Man in Miracle Sequence (uncredited)

Francesco Luzi as Radioreporter (uncredited)

Mario Mallarno as Reporter (uncredited)

Renato Mambor as A Tall Young Man (uncredited)

Vittorio Manfrino as Tabarin Director (uncredited)

Maria Marigliano as Massamilla (uncredited)

Carlo Mariotti as Male Nurse (uncredited)

Gino Marturano as Pimp (uncredited)

Maria Mazzanti as Woman at Airport (uncredited)

Harriet Medin as Sylvia's Secretary (uncredited)

Marta Melocco as (uncredited)

Nello Meniconi as Man on Via Veneto (uncredited)

Alex Messoyedoff as Priest at the Miracle Site (uncredited)

Gianfranco Mingozzi as Priest That Lets Steiner Play Organ (uncredited)

Lucia Modigliani as (uncredited)

Maite Morand as Reporter (uncredited)

Aurelio Nardi as Uncle of Lying Children of The Miracle (uncredited)

Desmond O'Grady as Steiner's Guest (uncredited)

Liana Orfei as (uncredited)

Umberto Orsini as Man in Sunglasses That Helps Nadia Strip (uncredited)

Contessa Cristina Paolozzi as Laughing Girl at Seance (uncredited)

Ada Passeri as Woman in Miracle Sequence (uncredited)

Franca Pasut as Girl Covered with Feathers (uncredited)

Loretta Pepi as (uncredited)

Paola Petrini as (uncredited)

Cesarino Miceli Picardi as Irate Man in Nightclub (uncredited)

Princess Doris Pignatelli as Lady in White Coat at Castle (uncredited)

Alberto Plebani as Doctor (uncredited)

Oliviero Prunas as Oliviero - Son of Prince (uncredited)

Giovanni Querrel as Man at Nightclub (uncredited)

Giulio Questi as Don Giulio (uncredited)

Concetta Ragusa as Reporter (uncredited)

Loretta Ramaciotti as Woman in Seance (uncredited)

Leonida Repaci as Steiner's Guest (uncredited)

Alfredo Rizzo as Television Director (uncredited)

Rosemary Rennel Rodd as English Medium (uncredited)

Giancarlo Romani as Policeman (uncredited)

Franco Rossellini as The Beautiful Horseman (uncredited)

Prince Eugenio Ruspoli di Poggio Suasa as Don Eugenio Mascalchi (uncredited)

Margherita Russo as Steiner's Guest (uncredited)

Anna Maria Salerno as Prostitute's Friend (uncredited)

Anna Salvatore as Steiner's Guest (uncredited)

Archie Savage as Negro Dancer (uncredited)

Lisa Schneider as Woman in Miracle Sequence (uncredited)

Maria Pia Serafini as Second Lady with the Irritated Man (uncredited)

Noel Sheldon as Man in Via Veneto (uncredited)

Isabella Soldani as (uncredited)

Letizia Spadini as Steiner's Guest (uncredited)

Giò Stajano as Pierone (uncredited)

Gino Talamo as (uncredited)

Sandra Tesi as Young Girl Living Nearby (uncredited)

Henry Thody as Reporter (uncredited)

Tomás Torres as Gianelli (uncredited)

Iris Tree as Poetess at Steiner's Party (uncredited)

Vando Tress as Police Inspector (uncredited)

Gondrano Trucchi as Servant at Caracalla's (uncredited)

Teresa Tsao as Woman in Nightclub (uncredited)

Winie Vagliani as The Lady Who sings at Steiner's (uncredited)

Leontine Van Strein as Matinee Idol's Girl Friend (uncredited)

Aldo Vasco as Man in Miracle Sequence (uncredited)

Lucia Vasilicò as Young Woman Making Confession at Nadia's Party (uncredited)

Maria Teresa Vianello as Woman at Airport (uncredited)

Sandy von Normand as Interpreter at the Press Conference (uncredited)

Antoinette Weynen as (uncredited)

Angela Wilson as Woman in Via Veneto (uncredited)

Vadim Wolkonsky as Prince Mascalchi (uncredited)

Maria Teresa Wolodimeroff as The Bored Lady (uncredited)

Gianni Zamputo as Man at Nadia's Party (uncredited)

Italo Zingarelli as Don Giulio (uncredited)

Iolanda Fortini as (uncredited)

Marta Timar as (uncredited)

Bruna Cealti as (uncredited)

Nancy Lecchini as Party Guest (uncredited)

Giulio Tomei as Night Club Customer (uncredited)

Lucia Cavalieri as Old Woman by the Miracle Tree (uncredited)

Edward Febo Kelleng as Party Guest (uncredited)

Rio Nobile as Nightclub Customer (uncredited)