ET Now: Just How Well Did The 'Muppets' Cast Get Along On Set?

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The Muppets are back for a new adventure in Muppets Most Wanted-- out March 21. Special ET correspondent, Ireland Baldwin, sat down with the stars of the film, including Kermit the Frog, Miss Piggy, Tina Fey and Ricky Gervais, who had a lot to share about the cast's chemistry on set.