Nicole Kidman (Grace Kelly), Milo Ventimiglia (Rupert Allan), Paz Vega (Maria Callas), Tim Roth (Prince Rainier III), Parker Posey (Madge Tivey-Faucon), Frank Langella (Father Francis Tucker), Derek Jacobi (Count Fernando D'Aillieres) more..., Geraldine Somerville (Princess Antoinette), Roger Ashton-Griffiths (Alfred Hitchcock), Nicholas Farrell (Jean-Charles Rey), Robert Lindsay (Aristotle Onassis), Olivier Rabourdin (Emile Pelletier), Pascaline Crêvecoeur (Grace Kelly's dresser), Jeanne Balibar (Countess Baciocchi), André Penvern (Charles de Gaulle), Nicolas Nasica (Driver Triumph), Flora Nicholson (Phyllis Blum), Yves Jacques (M. Delavenne), Jérémie Covillault (Mr. Sécurité Palais), Philip Delancy (Robert McNamara), Jean Dell (Denard), Guillaume Briat (Homme émission TV), Nicholas Hawtrey (Ministre), Alban Casterman (Producteur Hollywood), Laurent Jumeaucourt (Lieutenant français CRS), Ariane Séguillon (Femme du marché), Alexandre Pottier (Rainier Minister), Satya Dusaugey (Detective Madge)

Arash Amel (Screenplay), Arash Amel (Producer), Fanny De Donceel (Casting), Mathilde Snodgrass (Casting), Jean-Paul Hurier (Sound Re-Recording Mixer), Eric Baraillon (Gaffer), Gigi Lepage (Costume Design) more..., Olivier Gajan (Editor), François Borgeaud (Property Master), Corinne Devaux (Choreographer), Jean-Baptiste Faure (Boom Operator), Alain Carsoux (Visual Effects Supervisor), Dan Weil (Production Design), Philippe Penot (Foley), Katia Boutin (Music Editor), David Koskas (Still Photographer), Florent Lavallée (Sound Re-Recording Mixer), Pierre-Ange Le Pogam (Producer), Delphine Mabed (Art Direction), Toby Spigel (Casting), Johann Nallet (Sound Re-Recording Mixer), Tatiana Bouchain (Art Department Coordinator), Niels Terwingen (Construction Coordinator), Claire Chanat (Costume Supervisor), Guillaume Le Gouez (Visual Effects Supervisor), Pascal Villard (Supervising Sound Editor), Nadia Khamlichi (Executive Producer), Jeremy Burdek (Executive Producer), Uday Chopra (Producer), Adrian Politowski (Executive Producer), Irene Gall (Executive Producer), Uta Fredebeil (Executive Producer), Stefano Massenzi (Producer), Florian Dargel (Executive Producer), Andrea Occhipinti (Producer), Bruno Wu (Executive Producer), Gilles Waterkeyn (Executive Producer), Jim Seibel (Executive Producer), Bill Johnson (Executive Producer), Claudia Bluemhuber (Executive Producer) and others.