Marjorie Frantz is a French actress and artistic director, widely recognized for her extensive work in dubbing for French-language versions of films and television series. She is the daughter of the prominent French actor Jacques Frantz. Her entry into the dubbing profession came after she was noticed by artistic directors Isabelle Brannens and Hervé Icovic, with one of her earliest notable roles being the voice of Julia Roberts in the 1994 film Prêt-à-porter.

In the realm of animation, Frantz has lent her voice to a variety of characters. As noted, she voiced the character Madame Mumbletchuk in the 2017 animated film Mary and The Witch's Flower. Her other animation voice work includes the role of Mina in Bambi 2, Foxy in Chicken Little, and Foxy in Chicken Run. She also provided the French voice for Queen Zuma in the series Kung Fu Panda: The Dragon Knight. For television animation, she is notably the French voice of the title character in the series Daria. Her other animation credits include roles in Kim Possible as Warmonga, Duck Dodgers as Agent Yoshimi, and La Légende de Beowulf as Grendel's mother.

Beyond animation, Marjorie Frantz is highly prolific in dubbing for live-action content. She is the regular French voice for actresses such as Hilary Swank, Mila Kunis, and Toni Collette. She is also a recurrent voice for Cameron Diaz, Catherine Zeta-Jones, Ashley Judd, and Carla Gugino, among others. Her work as a voice artist also extends to audiobook narration. In addition to her acting, Frantz also works as an artistic director, overseeing dubbing projects.