The Great Muppet Caper was the second feature film starring The Muppets, released in 1981. It was directed by Jim Henson, and guest-starred Diana Rigg and Charles Grodin.
As the title suggests, the plot parodied big caper movies, with Kermit, Fozzie, and Gonzo as investigative reporters who foil a team of jewel thieves with a bit of help from their friends.