Merantau, released in some countries as Merantau Warrior, is a 2009 Indonesian martial arts action film written, directed and edited by Gareth Huw Evans, and starring Iko Uwais. The film, which marks Uwais' debut as an actor, is the first collaboration between director Evans and star Uwais. It also marks the acting debut of Yayan Ruhian, both of whom Evans met while shooting for a documentary in Indonesia which became his introduction to the Pencak Silat martial art.

Martial arts films are a subgenre of action films that feature martial arts combat between characters. These combats are usually the films' primary appeal and entertainment value, and often are a method of storytelling and character expression and development. Martial arts are frequently featured in training scenes and other sequences in addition to fights. Martial arts films commonly include hand-to-hand combat along with other types of action, such as stuntwork, chases, and gunfights. Sub-genres of martial arts films include kung fu films, wuxia, karate films, and martial arts action comedy films, while related genres include gun fu, jidaigeki and samurai films.