Heidi Klum’s famous rear may be making an appearance in this year’s highly-anticipated Halloween costume.

The supermodel shared a cryptic photo of what appeared to be a plaster cast of her entire midsection, including her back and bottom, via Instagram Friday.

“Feeling cheeky 🍑😜,” she teased the upcoming reveal in the caption, tagging prosthetic makeup designer Mike Marino.

Klum — who is known for flaunting increasingly hideous and over-the-top costumes at her annual ‘Heidiween bashes’ — previously teased the secret costume in an Oct. 1 post.

The “Project Runway” star shared multiple angles of a facial prosthetic mask against a metal display plate.

“This is just the beginning 👀👻💀🎃,” she captioned the early tease, adding the hashtag, #HeidiHalloween.

On Saturday, Klum, 52, p

See Full Page