What happens in the '90s . . . doesn't stay in the '90s. John Stamos, Danielle Fishel, and Tia and Tamera Mowry are among the stars who have gained their own followings on Instagram. You know you're dying to see what James Van Der Beek  and Tiffani Thiessen are up to, and even better, you know you want to see their #TBT pictures. Take a look through to see who you should be following!
Source: Instagram user johnstamos 
Mario Lopez may be a big-shot correspondent for Extra now, but once upon a time, he was just A.C. Slater from Saved by the Bell. He shares tons of fun pictures with the celebrities he's interviewing from his account , plus behind-the-scenes pictures with gnomes.
Source: Instagram user mariolopezextra 
Another Saved by the Bell star, Elizabeth Berkley, shares modern shots of her daily life from her account . Don't you want to know what she does on vacation in Paris?
Source: Instagram user elizberkley 
Tamera Mowry's account  is full of cute pictures with her kid, plus a healthy dose of #TBT photos.
Source: Instagram user tameramowry2 
The other Mowry sister, Tia, uses her Instagram account  to post pictures from behind the scenes of her new projects and around the house.
Source: Instagram user tiahardrict 
Who would have thought Urkel would have taken to Instagram so well? The former Family Matters star posts tons of personal pictures from his account .
Source: Instagram user jaleelwhite 
Follow Danielle Fishel  to get cute pictures from the set of her new show, Girl Meets World.
Source: Instagram user daniellefishel 
Candace Cameron Bure
Full House star Candace Cameron Bure posts pictures from her everyday (glamorous) life on her account .
Source: Instagram user candacecbure 
Neil Patrick Harris
Neil Patrick Harris  is a bigger star now than he was in the '90s, but he still belongs on the list because of his time on Doogie Howser, M.D. Check out his account  for adorable family photos and generally awesome pics.
Source: Instagram user instagranph 
Saved by the Bell's Tiffani Thiessen has a very active Instagram life, sharing pictures of her family and famous friends from her account .
Source: Instagram user tathiessen 
Laura Prepon is busy with Orange Is the New Black now, but the former That '70s Show actor also has a healthy Instagram life. On her account , you'll find selfies with her OITNB costars.
Source: Instagram user lauraprepon 
Because there's never a time when you don't need more John Stamos in your life, the Full House actor has an Instagram account  with pictures of parties, cute dogs, and, of course, the Olsen twins circa the early '90s.
Source: Instagram user johnstamos 
When she's not starring on The Big Bang Theory, Mayim Bialik is posting #TBT pictures from Blossom on her account .
Source: Instagram user missmayim 
Roswell's Shiri Appleby uses her account  to share old pictures and shots of food and dinner parties.
Source: Instagram user iamshiriappleby 
James Van Der Beek
For all intents and purposes, James Van Der Beek  is the '90s king of Instagram. His account  features tons of great pictures of pretty much everything he's doing.
Source: Instagram user vanderjames 
The former Dharma & Greg star uses her account  to share candid pictures of her family, plus some throwbacks from the late '90s.
Source: Instagram user jennaelfman 
Will & Grace's Debra Messing  loves Instagram. Like, loves it. She posts pictures from behind the scenes of all of her projects, plus her family vacations, on her account .
Source: Instagram user therealdebramessing 
Melissa Joan Hart
Melissa Joan Hart is all over Instagram with pictures from her current show, Melissa & Joey, plus photo shoots. Her account  is essentially everything you want.
Source: Instagram user melissajoanhart