Leslie Caron as Gilberte "Gigi"

Maurice Chevalier as Honoré Lachaille

Louis Jourdan as Gaston Lachaille

Hermione Gingold as Madame Alvarez ("Mamita")

Eva Gabor as Liane d'Exelmans

Jacques Bergerac as Sandomir

Isabel Jeans as Aunt Alicia

John Abbott as Manuel

Corinne Marchand as Young Lady with White Sunshade

Marie-Hélène Arnaud as Girl at Maxim's

Anne-Marie Mersen as Maxim Girl

Jack Ary as Waiter at "Palais de Glace" (uncredited)

Daniel Aubé as A boy at Jardins des Tuileries (uncredited)

Richard Bean as Harlequin (uncredited)

Cecil Beaton as Gentleman in Park (uncredited)

Jacques Bertrand as Maitre d'Hotel Maxim's (uncredited)

Paul Cristo as Restaurant Patron (uncredited)

Hubert de Lapparent as Gaston's Private Secretary (uncredited)

Cilly Feindt as Girl on Horseback at Pré Catelan (uncredited)

Edwin Jerome as Charles - Alicia's Butler (uncredited)

Maurice Marsac as Prince Berensky (uncredited)

Bernard Musson as Guest at Maxim's (uncredited)

Dorothy Neumann as Designer (uncredited)

Jean Ozenne as Monsieur Lachaille (uncredited)

Maruja Plose as Mannequin (uncredited)

Roger Saget as Pierre (uncredited)

Pat Sheehan as Blonde (uncredited)

Marilyn Simms as Redhead (uncredited)

Lydia Stevens as Simone (uncredited)

Jack Trevan as Coachman (uncredited)

François Valorbe as Henri - Gaston's Butler (uncredited)

Monique van Vooren as Showgirl (uncredited)

Betty Wand as Gigi (singing voice) (uncredited)

Leroy Winebrenner as Lifeguard (uncredited)