Marques was on set of Tia's comedy show Instant Mum and the pair wasted no time in goofing around.
Captioning a photo, Marques said: "Visited one of my favourite women in the world @tiadmowry on her show #InstantMom #tvland #nickatnite #tiamowry #marqueshouston #sistersister #funnyface."
TV writer Regina Hicks, who was a producer on the hit 90s show, also shared a photo via Twitter.
She said: "Had a mini Sister Sister reunion on #InstantMom today - loved seeing them back together @TiaMowry @marqueshouston."
Airing from 1994 to 1999, Sister Sister centred around twins Tia and Tamera Mowry, who were separated and adopted at birth.
Tia was adopted by mother Lisa Landry, while Tamera was adopted by father Ray Campbell, but they accidentally found each other some 14 years later and ended up living together.
Marques played their neighbour Roger Evans and they often rejected his advances, but he soon enough became their good friend.
Who else misses this show? We certainly do!
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!