Heart is a radio network of local adult contemporary music stations in the United Kingdom.
- June 12, 2012: Kermit the Frog and Pepe the King Prawn appear on the program Heart Breakfast, then-hosted by Jamie Theakston and Harriet Scott, in promotion with the British home video release of The Muppets. (archive listing)
- March 25, 2014: Kermit and Miss Piggy appear on Heart Breakfast, hosted by Jamie Theakston and Emma Bunton, to talk about Muppets Most Wanted. Kermit and Emma Bunton sing a duet of the Spice Girls song "2 Become 1," much to Piggy's chagrin. (archive listing)
- March 27, 2014: Kermit and Piggy chat with celebrity interviewer Charlie Girling about Muppets Most Wanted, as well as the Lady Gaga holiday special.