Bert and Ernie have been the best of friends since the pilot episode of Sesame Street. They were so well received by their test audiences that they were changed from side characters to main characters. They were originally performed by Jim Henson and Frank Oz, and were supposed to show how people with opposite personalities can still be the best of friends. People have had a lot of speculations about the relationship between Bert and Ernie for years, but finally Sesame Street has made something that gives us their whole origin story, and it's as "fresh" as it could possibly