'Hell or High Water' Stars Chris Pine and Ben Foster Discuss Who Would Be the Better Bandit

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Chris Pine is showing a different side in Hell or High Water, as well as in the interviews he's doing to promote the film.

The normally soft-spoken actor burst into song during a recent sit-down with ET, belting out "Rhinestone Cowboy," and a previous Q&A found him lighting up a cigarette and discarding a microphone onstage.

RELATED: Chris Pine Slams Superhero Diets, Reveals How He Bulked Up for 'Wonder Woman' Movie

Still, the straight-laced star saved most of his antics for the screen.

In Hell or High Water, Pine plays single dad Toby, who comes together with his ex-con brother Tanner (Ben Foster) to rob branch after branch of the bank that is foreclosing on their family land in West Texas. For their final bank heist, a showdown looms when the brothers collide with a Texas Ranger (Jeff Bridges) looking for one last triumph on the eve of his retirement.

Pine and Foster, who are best friends off-screen, speculated on who would make the best criminal in real life.

On who would drive the getaway car, it seems as if the keys would have to go to Foster, who is a "crazier" driver, according to Pine. But when it comes to which one would be the heartthrob of the duo, Foster yielded to Pine.

However, no matter how fast they drove or how many female fans they picked up along the way, the actors' fictional crime spree wouldn't last long, as Pine revealed who would crack under the pressure of an interrogation.

PIC: Ben Foster Looks Just Like Lance Armstrong in First Trailer for 'The Program'

"Definitely me!" Pine admitted.

Hell or High Water hits theaters Aug. 12.