Marika Lhoumeau is a Canadian actress and writer from Quebec, recognized for her extensive work in the field of French dubbing for film and television. She began her acting training at the Cégep de Saint-Hyacinthe, graduating from the interpretation program in 1990, and later pursued screenwriting at the Centre de formation professionnel L'inis from 2012 to 2013. Lhoumeau has been active as a comedic actress in Canadian cinema, with appearances in films such as Que Dieu bénisse l'Amérique, Continental, un film sans fusil, and Romaine par moins 30, and has been working in Quebec dubbing, narration, and voice replacement since 2001.

In the realm of voice acting, Lhoumeau is best known as the regular Quebec French voice for several prominent English-speaking actresses. She is the primary dubbing voice for Jennifer Connelly, providing the French Canadian voice for a wide range of Connelly's roles. These include Dahlia Williams in the 2005 horror film Dark Water (titled Eau trouble in Quebec) and Dr. Chiren in the 2019 cyberpunk action film Alita: Battle Angel (titled Alita: L'Ange conquérant). Her other notable dubbing work for Jennifer Connelly covers performances in Blood Diamond, Top Gun: Maverick, and Noah. Beyond Jennifer Connelly, Lhoumeau has established recurring dubbing collaborations with numerous other actresses. She is a regular voice for Eva Green in films like 300: Rise of an Empire and Miss Peregrine's Home for Peculiar Children, for Alice Braga in I Am Legend and The New Mutants, for Debra Messing in Along Came Polly and Searching, and for actresses including Kate Bosworth, Jane Adams, and Amy Poehler.

Lhoumeau's voice work extends significantly into animated series, which includes titles that fall within the anime and action-adventure genres. She provided a voice for the character Elphin in the Bakugan: Battle Brawlers franchise. Her other animation credits include roles in several long-running series such as the Total Drama franchise, including Total Drama Island, Total Drama Action, Total Drama World Tour, and Total Dramarama, as well as Jimmy Two-Shoes, Lunar Jim, Class of the Titans, and Ranger Rob.

In addition to her performance career, Marika Lhoumeau is also an accomplished writer. In 2017, she contributed to the collective work Larguer les amours, a collection of variations on the theme of romantic breakups published by Éditions Tête première. She has also written screenplays for short films, including writing credits for the short Lazyboy and the film On Earth as in Heaven.