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Alyssa Milano shared a big blast from the past!
The 42-year-old actress posted a Throwback Thursday photo that has all fondly remembering when Britney Spears dated Justin Timberlake.
In the undated snap, Milano is all smiles while hanging out with the former lovebirds and her friend Alaa.
The sweet memory is a reminder that the onetime Mickey Mouse Club members were in a relationship back in 1999.
WATCH: Did Alyssa Milano Post an Offensive Photo?
Remember their denim-matching days at the 2001 American Music Awards?

Katy Perry still can't get over it! In fact, she wore a denim dress just like Spears did, while her date, rapper Riff Raff, sported Timberlake's denim tuxedo at the 2014 MTV Video Music Awards.
Nostalgia for the original denim duo is still evident as seen by Milano's throwback with fan comments like, "Justney forever."
WATCH: Britney Spears Reacts to Katy Perry's Denim VMA Dress
But Justney ended their relationship in 2002, and Timberlake has been happily married to Jessica Biel since 2012. The couple has one son, Silas, who they welcomed in April.
Spears, of course, is also an adorable parent to her kids Sean, 9, and Jayden, 8. She recently dressed up as a mermaid while having some fun in the sun with her boys.
Check out her "mermaid life" in the video below.