It's a TGIF reunion!

"Step By Step" actress Christine Lakin (tomboy Al Lambert) posted the cutest throwback pic with "Full House" star Jodie Sweetin (aka Stephanie Tanner) via Instagram last weekend.

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The sitcom starlets look adorable in the flashback shot, which shows them as cute kiddies wearing some killer '90s outfits back in the day (left) ... and then today, looking far more stylish.

"Meant to post this yesterday- come on, we just get better with age right? Or at lease our outfits do :) @joditweetin," Lakin captioned the candid snap.

We think it's great that 35-year-old Lakin and 32-year-old Sweetin are still super close -- it's been almost 20 years since both shows went off the air!

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Sweetin missed out on another reunion at Dave Coulier's wedding in July, but she tells us she did get an invite.

"I was totally invited! I wish I could be there, but with kids and work, I wasn’t able to get away for it," she tells toofab. "If it was in town, I ABSOLUTELY would’ve been there!"

What do you think about the throwback snap? Tell toofab in the comment section below and check out even more TGIF stars then and now in the gallery above!

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