The Scorpion King was his first film, he did a small little bit in The Mummy [Returns] to introduce the Scorpion King, but The Scorpion King was really his first film.
In 2002, Dwayne Johnson starred in a spinoff of The Mummy franchise, the action-adventure movie The Scorpion King where he played the hunter-assassin Mathayus.
Directed by Chuck Russell and written by David Hayter, William Osborne, and Stephen Sommers, The Scorpion King stars Dwayne Johnson, Kelly Hu, Michael Clarke Duncan, Bernard Hill, Grant Heslov, and Steve Brand.
With The Scorpion King, Johnson put such speculations to rest, displaying a fine sense of comic timing rarely seen in action stars, while his giant physique and wrestling skills made the action sequences believable as well as exciting.