Speaking from the set of their forthcoming London-based movie The Muppets Most Wanted, Kermit and Miss Piggy have a special message for Kate and Prince William’s baby boy.

The Royal Baby was born on Monday, and his birth took the world by storm. In this brief video, Kermit and Miss Piggy want to congratulate Kate and Prince William, but the birth gives Miss Piggy an idea that her green frog friend is not a fan of.

Related: Disney is hoping to bring The Muppets to Broadway.

The Muppets Most Wanted is the sequel to Disney’s 2011 The Muppets revival and co-stars Ricky Gervais, Christoph Waltz, and Tina Fey. Reports earlier this year indicated that the film will include a wedding for Miss Piggy.

“The Muppets gang [head out on] a global tour, selling out grand theatres in some of Europe’s most exciting destinations, including Berlin, Madrid and London. But mayhem follows the Muppets overseas, as they find themselves unwittingly entangled in an international crime caper headed by Constantine — the World’s Number One Criminal and a dead ringer for Kermit — and his dastardly sidekick Dominic, aka Number Two, portrayed by Ricky Gervais,” reads the film’s official synopsis.

Related: Professor Snape knows the Royal Baby’s name.

The Muppets Most Wanted hits theaters March 21, 2014.