Marianne Leroux is a French voice actor known for her work in the dubbing of anime series and films for the French-language market. Her career encompasses a range of roles, from lead characters to recurring antagonists, demonstrating versatility across different genres of animation.

Leroux has contributed to several high-profile anime franchises. She is recognized for her performances in the Pretty Guardian Sailor Moon Crystal series, where she voiced the character Emeraude. In the third season of the same series, she took on the roles of two distinct antagonists, Kaolinite and Villuy, which were specifically noted by the user. Another prominent role includes voicing Naomi Misora in the French adaptation of the psychological thriller Death Note. She also lent her voice to the character Caulifla in the popular Dragon Ball Super series.

Her body of work includes a variety of other significant anime titles. Leroux voiced Layla Hamilton in the series Kaleido Star, a role that features a central character in a story about performers. She is also credited as the voice of Takius in Ragnarok The Animation and as Sumire Nagara in the film Evangelion: 3.0 You Can (Not) Redo. In the series MegaMan NT Warrior, she provided voices for the characters Miyu and Roll. Her work also extends to the ONA series 7SEEDS, where she voiced the character Chisa Taiami in both of its seasons, and to the Blue Exorcist franchise, where she portrayed Homare Todo.

In addition to her extensive anime dubbing work, Marianne Leroux has also participated in the dubbing of live-action films. Notably, she provided the French voice for General Ardmore, the character played by Edie Falco, in the 2022 blockbuster Avatar: The Way of Water.