A brand new action-packed trailer for the upcoming action-comedy stoner film 'American Ultra' has been released by Lionsgate. The film has Jesse Eisenberg and Kristen Stewart playing the leads.

Check out the film's new trailer below:

Here's the film's official synopsis:

'American Ultra' is a fast-paced action comedy about Mike (Eisenberg), a seemingly hapless and unmotivated stoner whose small-town life with his live-in girlfriend, Phoebe (Stewart), is suddenly turned upside down. Unbeknownst to him, Mike is actually a highly trained, lethal sleeper agent. In the blink of an eye, as his secret past comes back to haunt him, Mike is thrust into the middle of a deadly government operation and is forced to summon his inner action-hero in order to survive.

'American Ultra' has a talented supporting cast comprising Topher Grace, Bill Pullman, John Leguizamo, Connie Britton, Walton Goggins and Tony Hale. The film is is written by 'Chronicle' fame Max Landis and directed by Nima Nourizadeh (Project X).

'American Ultra' is set for an August 21 release.