One Direction To Star In Sesame Street (Yes, Really!)

One Direction may have conquered the world and amassed gazillions of adoring fans, but everyone knows you haven't truly made it until you've met Big Bird and Bert & Ernie!

So they have finally arrived in the ultimate hall of fame – by appearing in Sesame Street.

The boys went behind the scenes on the set of hit kids' show to film an upcoming episode alongside favourites including Elmo and Oscar The Grouch.