My Friend Dahmer is a 2017 American biographical psychological drama film written and directed by Marc Meyers about American serial killer Jeffrey Dahmer. The film is based on the 2012 graphic novel of the same name by cartoonist John "Derf" Backderf, who had been friends with Dahmer in high school in the 1970s, until the time Dahmer began his killing spree in 1978. The film stars Ross Lynch as Dahmer, Alex Wolff as Derf, Dallas Roberts as Lionel, Jeffrey's father, and Anne Heche as Joyce, Jeffrey's mother.

The film premiered at the 2017 Tribeca Film Festival and was released in the United States on November 3, 2017, by Hulu. The film grossed $1.4 million worldwide and received generally positive reviews from critics, who praised its historical accuracy and Lynch's performance.