Josh Duhamel appears on the "Ellen DeGeneres Show" on Friday -- dressed as Lloyd Christmas from "Dumb and Dumber," no less -- where Ellen, who's rocking a "Karla Kardashian" costume, plans the ultimate prank during the interview.
Josh was chatting about his new flick, "Lost in the Sun," when a man dressed as a "Fergie impersonator" jumps out from a box planted behind the sexy star. "AH! You son of a b--ch!" Josh screams in the clip, while leaping from his chair.
Duhamel wasn't the only actor getting in on the Halloween fun on Friday's episode with Ellen -- the comedienne also sent her executive producer and "Modern Family" star Eric Stonestreet through a haunted house ... and filmed the entire thing. Check out the video below to see the clip!
While making their way through the maze, a man wearing a Michael Myers mask jumps out from a closet door.
"Jiminy Christmas" Stonestreet shouts in the clip. "I'm telling you, he's the worst," Eric adds.
Needless to say, the entire experience definitely scared the hilarious star!
Which scare is your favorite from the show? Test your horror movie trivia below!