6 Underground is a 2019 American vigilante action comedy film directed by Michael Bay and written by Paul Wernick and Rhett Reese. The film stars Ryan Reynolds, Mélanie Laurent, Manuel Garcia-Rulfo, Adria Arjona, Corey Hawkins, Ben Hardy and Dave Franco. Bay produced the film with his longtime business partner Ian Bryce and Skydance's David Ellison, Dana Goldberg and Don Granger. It follows a group of people that fake their deaths and decide to form a vigilante team in order to stage a coup d'état against a ruthless dictator.

Michael Benjamin Bay is an American film director and producer. He is best known for making big-budget, high-concept action films characterized by fast cutting, stylistic cinematography and visuals, and extensive use of special effects, including frequent depictions of explosions. The films he has produced and directed, which include Armageddon (1998), Pearl Harbor (2001) and the Transformers film series (2007–present), have grossed over US$7.8 billion worldwide, making him one of the most commercially successful directors in history.