Marie-Line Landerwijn is a Belgian voice actress born on April 3, 1970, in Brussels, Belgium, who is primarily known for her extensive work in the French dubbing of animated series and films. Her career encompasses voice acting, voice directing, and adaptation.

Landerwijn is perhaps most recognized for her long-standing role as the voice of Ran Mouri in the French version of the long-running anime series Detective Conan, a role she has played since the series' first French dub in the mid-1990s. She has also voiced the character Mitsuhiko Tsuburaya in the same series. Her work on Detective Conan extends to its feature films; she voiced Ran Mouri and Mitsuhiko Tsuburaya in The Scarlet Bullet and Ran Mouri in The Bride of Halloween.

Another prominent role in her career is Ulrich Stern in the French animated series Code Lyoko, which she voiced for all four seasons. Her voice work spans a wide variety of other series and films. She voiced Timmy Turner in the French dub of The Fairly OddParents, Shaina in Saint Seiya: The Hades Chapter - Sanctuary, and Milo du Scorpion in the film Saint Seiya: Legend of Sanctuary. She has also contributed to the French versions of series such as BoJack Horseman, where she voiced multiple characters including Beatrice Horseman, and has had roles in D.Gray-Man, Mermaid Melody Pichi Pichi Pitch, and Reideen.

Beyond voice acting, Landerwijn has a significant career in voice directing and adaptation. She served as the art director for seasons 3 and 4 of Code Lyoko. Her direction work includes the French dubs of series such as The Amazing World of Gumball, Regular Show, Rick and Morty, and Initial D. She has also been responsible for the French adaptation of numerous Pokémon films and series, and has performed theme songs for the franchise. Her recurring collaborations in the Detective Conan franchise often involve voice actors Bruno Mullenaerts and Ioanna Gkizas.