Luc Warnant studied at the Saint-Luc art school in Liège, but quit after only one year. He subsequently went to work in the studio of Édouard Aidans, where he drew the characters 'Pouf et Poil au nez'. He also published two pages in Spirou's Carte Blanche section in 1974. He worked as the assistant of André Beckers and Mittéï, and was at one point offered to continue Maurice Tillieux's detective series 'Gil Jourdan'.
The publisher asked him to come up with a character of his own however, and Warnant returned on the pages of Spirou with 'Timothée Octave Wang' (also known as 'T.O. Wang') in 1981. He wrote and drew two long stories with the character until 1984 and then teamed up with Tome to create the successful action series 'Soda' in 1986. Although the series about a New York police officer who dresses as a priest to mislead his mother was an instant hit, Warnant handed it over to Bruno Gazzotti in the middle of the third story to focus on advertising assignments.
Warnant has since made sculptures, designed 3D characters for animation ('Tristan et Iseult') and worked as an art director for a Luxembourg-based firm. He is also a teacher in 3D modeling and sculpting with the Haut École Albert Jacquard in Namur, Belgium.