Audrey Hepburn as Princess Ann

Gregory Peck as Joe Bradley

Eddie Albert as Irving Radovich

Hartley Power as Mr. Hennessy

Harcourt Williams as Ambassador

Margaret Rawlings as Countess Vereberg

Tullio Carminati as Gen. Provno

Paolo Carlini as Mario Delani

Claudio Ermelli as Giovanni

Paola Borboni as Charwoman

Alfredo Rizzo as Cab driver

Laura Solari as Hennessy's Secretary

Gorella Gori as Shoe Seller

Armando Annuale as Admiral Dancing with Princess (uncredited)

Maurizio Arena as Young Boy with Car (uncredited)

Gildo Bocci as Flower Seller (uncredited)

Andrea Esterhazy as Embassy Aide (uncredited)

George Higgins as Correspondent at Poker Game (uncredited)

Richard McNamara as Correspondent at Poker Game (uncredited)

Luigi Moneta as Old Man Dancing with Princess (uncredited)

Piero Pastore as Faceless Man on the Barge (uncredited)

Mimmo Poli as Worker Hugging the Three Out Side Police Station (uncredited)

Giuliano Raffaelli as Faceless Man on the Barge (uncredited)

Carlo Rizzo as Police Official (uncredited)

Gianna Segale as Girl at Cafe Waving at Irving (uncredited)

Dianora Veiga as Girl at Cafe Waving at Irving (uncredited)

Marco Tulli as Pallid Young Man Dancing with Princess (uncredited)

Tania Weber as Francesca - Irving's Model (uncredited)

Catherine Wyler as Schoolgirl (uncredited)

Nadia Balabine as Woman of Importance Watching the Military Parade (uncredited)

Silvio Bagolini as Undetermined Role (uncredited)

Alfred Browne as Correspondent at Poker Game (uncredited)

Franco Corsaro as Undetermined Role (uncredited)

John Cortay as Correspondent at Poker Game (uncredited)

Julián Cortés Cavanillas as Julian Cortes Cavanillas of 'ABC Madrid' (uncredited)

Vittoria Crispo as Undetermined Role (uncredited)

Ugo De Pascale as Embassy Aide (uncredited)

Giovanni Fostini as Correspondent at Poker Game (uncredited)

Paul Gary as Undetermined Role (uncredited)

Sidney Gordon as Correspondent at Poker Game (uncredited)

Edward Hitchcock as Head of Foreign Correspondents (uncredited)

John Horne as Master of Ceremonies (uncredited)

Adam Jennette as Speaking Correspondent (uncredited)

Cirillo Konopleff as Ihre Hoheit der Furst von und zu Luchtenstichenholz (uncredited)

Diana Lante as Lady in Waiting (uncredited)

Princess Lilamani as The Raikuuari of Khanipur (uncredited)

Rio Nobile as Embassy Officer at Press Conference (uncredited)

Octave Senoret as Faceless Man on the Barge (uncredited)

Amedeo Trilli as Undetermined Role (uncredited)

Helen Tubbs as Undetermined Role (uncredited)

Joop van Hulzen as Undetermined Role (uncredited)

Judy Wyler as Schoolgirl (uncredited)