Have mercy, John Stamos!

With less than a week to go before Netflix debuts "Fuller House," the 52-year-old actor posted an amazing throwback video featuring Mary-Kate and Ashley Olsen from when they were toddlers.

WATCH: 'Full House' Stars Come Together for a Very Special Reunion on 'Tonight Show'

The Instagram shows the twins dressed in matching outfits as they go to give their on-screen uncle kisses."#StamosHomeMovies #Fullerhouse Hawaii '89 Mk/A #GiveHimaHug," he captioned the video.

A video posted by John Stamos (@johnstamos) on

The Olsens will not be reprising their role as Michelle Tanner on the "Full House" reboot, but the show will give them a nod in the first episode. Viewers will learn that the youngest Tanner is running a fashion empire in New York, just like the sisters do in real life.

WATCH: First Photos From 'Fuller House' Show a Tearful Tanner Family Reunion

"It was my idea," John Stamos explained of the plot line. "We were playing around with jokes. It's not meant to be a diss. It's just kind of like, 'Oh!'"

"Fuller House" hits Netflix on Feb. 26.