Dan Mazer (born 1971) is a British screenwriter, TV/film producer, and comedian. He is best known as the long-time writing and production partner of Sacha Baron Cohen and has worked with him on such characters as Ali G and Borat. Mazer co-wrote and co-produced the films Ali G Indahouse (2002), Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan (2006) and Brüno (2009).Mazer attended The Haberdashers' Aske's Boys' School, where he met Baron Cohen.