Marie-Mam Sai Bellier (1994) is a Paris-based French-Gambian type designer, artist, lecturer, and researcher. Her transdisciplinary practice reimagines writing beyond the Latin alphabet through a "Nouvel Art Décoratif", blending typography, materiality, and visual storytelling. Founder of Diorama Type Partners and member of the post-binary collective Bye Bye Binary, she works with leading clients and artists across contemporary art, fashion, music, design and creating bespoke typefaces, visual identities, artistic direction, and image concepts. Her recent solo exhibitions include L’Amour en cage (CAC Passages, 2025), Die and Retry (Hôtel Van Eetvelde, 2025), and Cœur de Marie (Musée des Beaux-Arts de Nancy, 2025–2026).