MTV Movie Awards Promise Stars Galore, Summer Film Previews

Top L, clockwise: Kevin Hart at the Oscars on Feb. 28, 2016, at the Dolby Theatre in Los Angeles. (Chris Pizzello/Invision/AP); Melissa McCarthy on April 6, 2016, in New York. (Charles Sykes/Invision/AP); Australian actor Chris Hemsworth in Hong Kong on April 7, 2016. (AP Photo/Vincent Yu); Charlize Theron on April 7, 2016, in Inglewood, Calif. (Richard Shotwell/Invision/AP); Will Smith on March, 20, 2016, in New York. (Charles Sykes/Invision/AP); Dwayne Johnson on June 6, 2015, in Culver City, Calif. Phil McCarten/Invision/AP

BURBANK, Calif.—Will Smith, Charlize Theron, Melissa McCarthy and Chris Hemsworth are set to bring their star power to the MTV Movie Awards this weekend.

Charlize Theron arrives at WE Day California at the Forum on Thursday, April 7, 2016, in Inglewood, Calif. Richard Shotwell/Invision/AP