The short clip only features audio of the two stars, and shows off the 19-year-old's potty mouth. Miley lets several expletives fly as she tells Liam of an alarming situation -- two naked people are getting into her car.
Fans can hear sirens in the background, so we presume the "cops" are called to the scene, but it's more likely that any authority figures involved have been hired by the prankster show. We can only imagine what Liam's face looks like when the big reveal takes place.
Check out the promo here, and catch the new season of 'Punk'd' on MTV on March 29. Will you be tuning in to the show?