Hellboy is a 2019 superhero film based on the Dark Horse Comics character of the same name, created by Mike Mignola. A reboot of the Hellboy film series, it is the third live-action entry in the franchise; directed by Neil Marshall, the film stars David Harbour in the title role, alongside Milla Jovovich, Ian McShane, Sasha Lane, Daniel Dae Kim, and Thomas Haden Church. The film draws inspiration from the comic books Darkness Calls, The Wild Hunt, The Storm and the Fury, and Hellboy in Mexico. In the film, Hellboy struggles with his psyche while preventing a resurrected sorceress from conquering the world.

The project began as a sequel to Hellboy II: The Golden Army (2008), with screenwriter Andrew Cosby and Mignola writing the script. Guillermo del Toro was not offered the full writer-director role he had performed in the previous films, and Ron Perlman, who had portrayed Hellboy, refused to return without del Toro's involvement. The project was turned into an R-rated reboot after Marshall was hired as the director and Harbour cast as Hellboy. Principal photography began in September 2017 in the United Kingdom and Bulgaria, and ended in December.

Hellboy had its premiere in New York City on April 9, 2019, and was released in the United States on April 12, by Lionsgate. The film received negative reviews from critics, with criticism aimed at the story, inconsistent tone, and excessive gore, along with unfavorable comparisons to the del Toro films, but praise for the make-up effects and Harbour's performance. The film bombed at the box office after grossing $55.1 million against a $50 million production budget.

A second reboot of the film series, titled Hellboy: The Crooked Man, was released in 2024.