A slew of celebrities posted throwbacks and party snaps in honor of the 2019 Emmys on Sunday night.

Blake Lively joined in on the fun and shared some photos of her own with former "Gossip Girl" co-star Leighton Meester from the time the two presented the award for outstanding directing in a comedy series at the 61st Primetime Emmy Awards in 2009.

She also included a snap posing with her mother, Elaine Lively, in the post.

"Gossip Girl" fans unsurprisingly went wild in the comments section, and Lively's husband, actor Ryan Reynolds, also weighed in on the photos she shared.

"I can’t believe how much I’ve changed," he joked.

The star's throwback comes after it was was recently announced that the popular CW drama, which ran from 2007 until 2012, will be rebooted.

Few details are available about the "Gossip Girl" reboot, but we do know that the show's original creators, Josh Schwartz and Stephanie Savage, are involved.

Joshua Safran, a writer and executive producer of the original, will also write the reboot.

"It's something we've been talking about — [series creators] Josh [Schwartz], Stephanie [Savage] and I — for a little bit, just in terms of, 'Is this something we want to explore?' We're all so in love with the original and had such an incredible time working on it, and it's such a big part of our lives," Safran told The Hollywood Reporter at the time of the announcement in July.