E! Online recently spoke with Zach Galifianakis and Robert Downey Jr. about their new comedy Due Date, and it was revealed that Zach Galifianakis is making an appearance in The Muppets. Take a look at the brief video below:

Since Zach Galifianakis will only be filming for "a couple of days", it will likely be a cameo appearance in the movie, which starts shooting next month.