'The 5th Wave' costars discuss new action-packed film

LOS ANGELES (KABC) -- The human race is on the brink of extinction in the new film "The 5th Wave," but that doesn't mean a determined group of young people isn't going to give its all to saving the world.

In the film, Chloe Grace Moretz stars as a 16-year-old trying to survive different waves of disaster, including an electromagnetic pulse that takes out all of our power grids. Then, there are earthquakes, floods and disease.

Moretz and costar Alex Roe said it's far scarier than any horror movie.

"...Humans are so vulnerable to natural disasters because it's the one thing we can't control... Mother Nature always wins - always," they said.

The teens must grow up fast if they have any hope of surviving "The 5th Wave," an alien invasion.

"What's nice is these are young adults in adult stories...We're treating young adults as they should be treated...because young adults do amazing things," the actors added.

Moretz said her character is an ordinary teen who builds courage to fight for the world.

The actors had to confront many of their own fears while filming but said they felt it was important not to bring their work home with them at the end of the day.

"I think we shook it off," Moretz said. "We'd have a lot of fun off set...and just hang out and have a good time...I think we needed to shake it off because it was such heavy stuff we were doing."

"The 5th Wave" is rated PG-13 and is in theaters this weekend.