Who was first celebrity guest on sesame street 1969?

The first celebrity guest on "Sesame Street," which premiered in 1969, was comedian and actor Jerry Nelson. He appeared in the show's inaugural episode, bringing his unique brand of humor and talent to the beloved children's program. Nelson was known for his work as a puppeteer and voice actor, contributing to various characters on the show. His appearance set the stage for many other celebrity guests in the years to follow.