Guillermo Arriaga Jordán (Spanish pronunciation: ) (born 13 March 1958) is a Mexican author, screenwriter, director and producer. He received the 2005 Cannes Film Festival Best Screenplay Award for The Three Burials of Melquiades Estrada.
Arriaga was born in Mexico City and spent his childhood in one of the most violent sectors of the metropolis. At the age of 13 he lost the sense of smell after a brutal street fight that would later serve as inspiration for some of his work.
Before engaging in his writing career, Arriaga tried out a variety of jobs and professions, amongst which were that of boxer, basketball player and professional soccer player.