Dwayne Johnson tries to save giant silverback gorilla in 'Rampage' trailer

Nov. 17 (UPI) -- Warner Bros. Pictures has released the first trailer for Dwayne Johnson's animal adventure Rampage.

The action-packed, 2 1/2-minute clip was viewed more than 3 million times since it was posted on YouTube Thursday.

Directed by Brad Peyton and based on a video game, the movie co-stars Naomie Harris, Malin Akerman, Jake Lacy, Joe Manganiello and Jeffrey Dean Morgan. It is set for theatrical release April 20.

"Primatologist Davis Okoye, a man who keeps people at a distance, shares an unshakable bond with George, the extraordinarily intelligent, silverback gorilla who has been in his care since birth," a synopsis accompanying the preview explained. "But a rogue genetic experiment gone awry mutates this gentle ape into a raging creature of enormous size. To make matters worse, it's soon discovered there are other similarly altered animals. As these newly created alpha predators tear across North America, destroying everything in their path, Okoye teams with a discredited genetic engineer to secure an antidote, fighting his way through an ever-changing battlefield, not only to halt a global catastrophe but to save the fearsome creature that was once his friend."