In the seductive clip, Spears leaves her abusive playboy boyfriend for Trawick, whom she later joins on a London crime spree. The two also strip down for a steamy sex scene before caressing each other's nude bodies in the shower.
Because Trawick, 39, isn't a professional actor, director Chris Marrs Piliero was hesitant to cast him as Spears' dangerous love interest.
"I wanted to make a really rad, epic video, and I definitely got the sense from Britney that she wanted something really cool," he explained to MTV News. "And in my mind, I was just thinking, 'We really should not be using your boyfriend; we should get an actor.'"
Trawick, who shed an impressive 50 pounds in the past two years, managed to impress the director with his rock hard abs and spot-on acting abilities.