Sean Gullette is a New York-based writer and actor who first received international acclaim for his role in Darren Aronofsky's film Pi. In Pi, Gullette played Max Cohen, a troubled and aloof mathematician searching for patterns and meaning in the number Pi. Along with being the movie's lead actor, he also co-wrote the original script for the movie and he helped design the film's promotional website. Gullette also starred in the Aronofsky film Requiem for a Dream, as a psychiatrist.

Gullette graduated Magna Cum Laude from Harvard University in 1991 with a degree in literature. He has studied acting in London and New York City.