Today marks the 40th anniversary of Sesame Street. The show aired it’s first season back in 1969 and became an international phenomenon ever since.

But don’t tell Big Bird That. In this interview with Jimmy Kimmel he still thinks he’s only 6 years old.

It only seems appropriate for Jimmy Kimmel, who has dressed up as Big Bird in the past, to interview Sesame Street’s biggest star in person. Of course it’s impossible to tell who really is in the suit in this clip, but the performer is most likely Caroll Spinney.

Spinney, who is currently 75 years old now is still surprisingly as sharp as ever. Here’s to many more years of Sesame Street!