Constantine

Constantine is the world's "Number One" criminal and a doppelgänger of Kermit the Frog. Along with his sidekick Dominic (aka "Number Two"), Constantine sets out out to steal an enormous diamond in Muppets Most Wanted. However, mayhem ensues when he gets entangled with the Muppet troupe on their European tour. He is the Main Antagonist of the film.

Constantine is performed by Matt Vogel.

He is almost identical to Kermit aside from a few details. His pupils are shaped like Kermit's, but are slanted in toward each other at a sharper angle. Kermit's signature 11-point collar is duplicated, but Constantine's is notably shorter. The most distinguishable difference is a beauty mark on Constantine's face that he has covered up. Kermit is seen with the beauty mark while detained in a Russian prison, presumably mistaken for Constantine.

Background
When asked whether he would be playing both the role of himself and Constantine, Kermit replied in the negative (although he did imply that nepotism was involved in casting): "No. We talked about putting me in makeup and having me play both roles, but we decided Constantine needed to be a guy who could do a Russian accent. And, you know, I'm a pretty accomplished actor and all, but besides The Muppet Christmas Carol and Muppet Treasure Island films, I've only really ever played myself. The great thing is, I have like 3,000 relatives back in the swamp, so it was quite easy to find a frog who could play Constantine."