Zachary Knighton, Elisha Cuthbert Zachary Knighton, Elisha Cuthbert

Groovy, baby! Or is it "spooky, baby"?

Happy Endings' much-anticipated Halloween episode — for which we were told to "buckle up" — will naturally have the silly sextet in costumes, but you don't have to wait until Oct. 26 to get a glimpse at them.

Eliza Coupe on egg babies and her Black Swan moment that might've saved Happy Endings

Behold Dave (Zachary Knighton) and Alex (Elisha Cuthbert) doing their best Austin Powers and Marilyn Monroe at a warehouse party, where their get-ups don't go over quite as they anticipated. It's also at this party that Alex meets Henry (David Walton), a potential new beau. Get your first look at the costumes below. Happy Endings airs Wednesdays at 9:30/8:30c on ABC. Next week's episode features Megan Mullally as Penny's mother.