The blue monster who often gets excited and says “Oh, I’m so excited” is Grover. He is one of Sesame Street’s most recognizable Muppets, known for his energetic personality, furry blue appearance, and enthusiastic attempts to help others.
Grover began as an earlier monster character created for The Ed Sullivan Show in 1967 and appeared on Sesame Street during its first season. The character was named Grover in 1970, and his familiar blue-furred appearance developed around the same period. Frank Oz performed Grover for decades, with Eric Jacobson later becoming a regular performer.
His excitement is part of his broader personality: Grover is eager, polite, and determined, but his plans often create comic confusion. He rarely uses contractions when speaking, giving lines such as “I am” and “I do not” a distinctive rhythm. His best-known alternate identity is Super Grover, a well-meaning but often ineffective superhero.
Grover is sometimes confused with Cookie Monster because both are blue monsters. Cookie Monster is defined by his intense love of cookies, while Grover is the energetic, expressive character associated with enthusiasm and helpfulness.