Contrary to popular belief, he has never turned into a prince when kissed.
Kermit's biography states he was born on May 9th, 1955.
Was managed by Jim Henson until Henson's death in May 1990. Since then, Kermit's public profile was elevated to new heights with the assistance of Steve Whitmire, until Disney fired Whitmire, replacing them with Matt Vogel and Constantine in October 2016.