Brightburn is a 2019 American superhero horror film directed by David Yarovesky, written by Brian and Mark Gunn, and produced by James Gunn and Kenneth Huang, starring Elizabeth Banks, David Denman, Jackson A. Dunn, Matt Jones, and Meredith Hagner. The plot follows Brandon Breyer, a young boy of extraterrestrial origin reared on Earth who discovers he has superpowers, using them with dark intentions. The film was financed by The H Collective, who produced with Troll Court Entertainment.

Brightburn was announced as "Untitled James Gunn Horror Project" in December 2017. Gunn produced the film, while his brother Brian and cousin Mark penned the screenplay, which adapts the concept of Superman for explicit horror. Principal photography began in March 2018 and wrapped in May of that same year.

Brightburn was released in the United States on May 24, 2019, by Screen Gems and Stage 6 Films. The film received mixed reviews from critics, who praised its visual effects, acting performances, cinematography, humor, and score, but felt that it did not deliver on the full potential of its premise. The film grossed $33.2 million against a production budget of $6–12 million and has gained a cult following.

A spaceship crashes in a forest in Brightburn, Kansas. Tori and Kyle Breyer, a couple struggling with fertility, witness the explosion from their house and investigate the crash site. They find the spaceship with a baby inside, whom they adopt and name Brandon.

On Brandon's 12th birthday, he discovers he has super-strength and flight abilities. In middle school, Brandon is an academically exceptional student, despite being socially strange and frequently bullied. Brandon begins to show interest towards his classmate Caitlyn Connor, sneaking into her room at night and scaring her.

One day, during a trust exercise in a Physical Education class, Caitlyn lets Brandon fall to the ground, calling him a pervert. Angered by her accusation, Brandon crushes her hand, and is suspended from school after being accosted by Caitlyn's mother, Erika, who wants him arrested.

At night, the spaceship emits an otherworldly language that attracts Brandon to the barn. Tori follows, and sees him levitating, chanting the ship's alien message, before falling and accidentally cutting his hand on the wrecked ship. She reveals the truth of his origin, causing Brandon to angrily declare his hatred towards his adoptive parents and storm out of the house. Brandon deciphers the spaceship's message ("Take the world"), causing his evil identity to take form. As revenge for being humiliated at school, Brandon uses his powers to torment and kill Erika at a diner.

Police discover a symbol drawn on all diner windows, made visible when the sheriff breathes on one of them while investigating Erika's disappearance. It is the same symbol Brandon is seen drawing in his notebook. Brandon visits his aunt's house to convince her to keep his incident at school a secret, but she refuses. Feeling rejected, Brandon begins to stalk her around the house but gets caught by his uncle, Noah. After Noah threatens to tell his father about his behavior, Brandon frightens and kills him by dropping his truck on a dark road as he tries to escape. Brandon reaches into the wreckage and dips his finger in his uncle's blood to draw his notebook symbol on the pavement.