Have mercy! John Stamos posts sideburn-heavy pic from 'Fuller House' set

Stamos Still Looks Just Like Uncle Jesse Visiting 'Fuller House' Set

Have mercy! Uncle Jesse has returned!

John Stamos posted a photo from the set of Fuller House, the Netflix reboot he's not only acting in but producing as well.

WATCH: John Stamos is Out of Rehab

The Instagram snap proved that even though he's also starring in a sitcom titled Grandfathered, Stamos has barely aged a day since Full House premiered in 1987. (Yes, that's almost 30 years ago. No, we don't know how that's possible either.)

"And we're back!" he wrote. "Same sideburns -- different decade."

Even more nostalgia-inducing was the tweet Stamos sent a few hours later, writing he was "home again after 25 years."

MORE: See Exclusive Pics From Lifetime's Unauthorized Full House Story

All of the '80s feelings are flooding back right now!

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