Anson Williams, 77, posted a shirtless mirror selfie to Instagram Sunday with a message defying age stereotypes.
The “Happy Days” alum flaunted his biceps in a bathroom photo that quickly drew attention from fans and fellow boomers. Williams, who played Potsie Weber for all 11 seasons of the beloved sitcom, used the moment to push back against the idea that older adults should fade into the background.

“My yearly reminder to every Boomer: NEVER let anyone diminish us because of our age,” he captioned the post. “I’m 77. More creative, healthier, busier, more curious — and more alive than I was at 40.”
Williams credited multiple forces for keeping him vital. He named his wife, Sharon MaHarry, who “sees the best in” him, alongside “good lovin,” “kindness” and “adventure.”

He also urged his generation to maintain “little discipline” with their habits. “Eat right, move, take care of yourself,” he wrote.

The actor kept the momentum going with more rallying words. “Mountains still worth climbing,” he continued. “And the absolute refusal to let anyone else decide my worth. We didn’t come this far to become invisible. We came this far to become unstoppable.”

Williams framed his current chapter as one of acceleration, not decline. “Not winding down,” he declared, but “still winning.” He closed with a final forward-looking promise: “And we haven’t even played our best hand yet.”
The comments section filled with supporters. “I’m 54, If a time traveler from the future showed up with this photo and told me, ‘This is you at 77,’ I would be stoked!” one fan wrote.

“Way to go Potsie!!!” another commented, invoking Williams’ iconic character. “Couldn’t resist … you’re looking great Anson!” A third added: “Looking good and inspiring people! I am taking your message to heart. I needed a reminder.”

Others simply praised him for “looking healthy and fit.”

Williams starred alongside Ron Howard, Henry Winkler and Marion Ross on “Happy Days” from 1974 to 1984. The Milwaukee-set sitcom became his defining role, though he later appeared on “Baywatch” and “Star Trek: Voyager.”
In recent years he has shifted to directing and is currently working on the off-Broadway production “Crazy Mama: A True Story of Love and Madness.”

Williams’ post lands in a broader wave of veteran stars baring skin and defying expectations. John Stamos, 63, maintained his own birthday tradition of sharing nude photos, while Barry Williams’ musical turns had previously inspired Anson to sing on “Happy Days” — a pivot that altered his career trajectory.

