Photo Credit: Jon Kopaloff/FilmMagic
The set-up is simple: Cyrus, 19, convinces Hemsworth, 22, that there are two strangers cavorting in her car. A clip from the episode shows a half-dressed man and woman sneaking into an SUV.
"Oh, my God, babe — there's two naked people in my car right now," Cyrus tells Hemsworth in the footage.
After the actress fakes a posture of panic, Hemsworth (who stars in the upcoming The Hunger Games) instantly jumps into protective boyfriend mode, stalking up to the car and saying, "Get out of the f–king car right now!" among other bleeped out remarks.
The twosome, who met on the set of The Last Song, have been dating for more than two-and-a-half years and aren't shy about publicly parading their relationship. In December, Cyrus told her Twitter followers why they should vote for Liam as the no. 1 celebrity boyfriend.
"He's not only the best boyfriend he is one of the most incredible human beings I've ever known!," she said. "... it's been 2 1/2 years of pure bliss with him! Let's get him the #1 spot!"
Punk'd returns to primetime March 19 on MTV.
Watch the preview!