Guillaume Musso is a French novelist, born on 6 June 1974 in Antibes, Alpes-Maritimes, France. He is recognized as one of the most popular contemporary French authors.

From an early age, Musso was passionate about reading books and plays, which inspired him to become a novelist. After completing high school in France, he ventured to the United States at the age of 19, spending several months in New York City. During his time there, he lived with other young foreigners and supported himself by selling ice-cream. This experience filled him with ideas for novels, and the influence of his time in the United States is often reflected in the settings of his books.

Musso currently teaches at a high school in the south of France while continuing to work on his novels. His first published novel was with Editions Anne.