The answer is Kenan Thompson. He was the first cast member from Nickelodeon's "All That" to join "Saturday Night Live," and he holds the distinction of being the first "SNL" cast member born after the show's debut in 1975.
Kenan Thompson
a first public performance would be 'debut'
If you mean Debut, it is the first public appearance of a player or a performer
Wu Chan is a Taiwanese actor, singer, and performer. He became famous after being the oldest and last member to join the boy band Fahrenheit. Its debut was from 2005 to 2011.
Debut. However a performer can have numerous 'debuts' apart from the first ever performance - for a particular opera house, for a particular opera / character etc.
Mr. Peanut.
No muppet has ever hosted Saturday Night Live, but the television debut of Kermit the Frog was on The Ed Sullivan Show.
Adam Sandler
Next Saturday morning at 9:00am on Bravo and Bravo+1
Late in 2003, after the release of their debut album.
Mohamed Azharuddin of India (former captain and now member of indian parliament) got 3 consecutive centuries in his debut matches.
Kurt angle at the royal rumble 2000
Their debut album was called Chasing Lights, and their second was called Wordshaker. I think their third (last) album is called Headlines.