63-year-old John Stamos marked his birthday with a black-and-white Instagram mirror selfie taken in the nude, captioning the post simply, "63."
The photo showed Stamos' abs and a left-shoulder tattoo while his phone covered his face, prompting fans to flood the comments with "Full House" references including "HAVE MERCY" and "Uncle Yes-se."
Candace Cameron Bure joined the reaction with a "Happy birthday Uncle J" comment, underscoring how closely fans still tie Stamos to his Uncle Jesse role.
The post also renewed attention on the tattoo Stamos first revealed in March, which he said was inspired by The Beach Boys' Brother Records symbol and his push into a new career chapter.
Separately, Stamos recently said on "The Bobbycast" he has repeatedly turned down "Dancing with the Stars" and told producers never to ask him again.