"Say my name" #StamosHomeMovies #Fullerhouse #MkAshley. #TBT," the actor wrote alongside the video which was timestamped as being filmed in 1989.
The home video shows one Olsen twin pronouncing "John" as a two-syllable word while the other says "Jesse" from behind the camera before quickly sticking her tongue out at her television uncle.
This is the second time Stamos has shared older footage of the sisters, posting another video from 1989 of the Full House cast on vacation in Hawaii back in February.
Netflix's Full House revival Fuller House debuted recently which follows the continuing story of the Tanners and reunites the majority of the original cast except for the Olsens who declined to participate. The show made reference to that fact during the first episode letting viewers know that their character, Michelle Tanner, is busy running a fashion empire in New York -- a nod to their careers in real life.
Following Fuller House's premiere, Stamos exclaimed on Today that he was going to try and convince them to come back for the already announced second season. "I was going to see Ashley last night and beg her to be on the show," Stamos said. "We would love to have them. I know everybody would love to see them. I have a good feeling about it."