"In the blink of an eye," Stamos captioned the snap. "Congrats MK."
Stamos wasn't invited to the wedding -- and it doesn't appear that any other "Full House" castmates were, either -- but that hasn't stopped the actor from wishing Mary-Kate and her sister well in the past. Though they had a brief dust-up earlier this year over the twins' knowledge of "Fuller House," they eventually patched things up.
Congrats to Mary-Kate, and cheers to Stamos for being so sweet -- and giving us some serious nostalgia.
Photo credit: John Stamos
