He gave life to Big Bird and Oscar the Grouch on "Sesame Street." Through them, he taught so many kids about letters and numbers ... And he began to learn the alphabet - because when we started ...

“At the end, Oscar came out and was going to take questions ... Walker, even sang the alphabet when an audience member said he helped him learn his ABCs. Spinney’s been on the show since ...

As Conan O’Brien prepares to kick off the 97th Academy ... he captioned a photo of himself with Sesame Street‘s Oscar the Grouch during a recent Jimmy Kimmel Live sketch.