Jaco Van Dormael Director, Screenwriter Jared Leto Nemo Adult, Old Nemo Actor Sarah Polley Elise Adult Actor Diane Kruger Anna Adult Actor Linh Dan Pham Jean Adult Actor Rhys Ifans Father Nemo Actor Natasha Little Mother Nemo Actor Juno Temple Anna age 15 Actor Clare Stone Elise age 15 Actor Thomas Byrne Nemo age 9 Actor Audrey Giacomini Jean age 15 Actor Toby Regbo Nemo age 15 Actor Philippe Godeau Producer Jean-Yves Asselin Executive Producer Christophe Beaucarne Cinematographer Susan Shipton Film Editing Mátyás Veress Film Editing Pierre Van Dormael Original Music Sylvie Olivé Production Design Regine Constant Set Decoration Stéphane Taillasson Art Director Ulla Gothe Costume Design Uwe Bünker Casting Anja Dihrberg Casting