Sarah Michelle Gellar Celebrates 19th Anniversary of 'Buffy the Vampire Slayer' With Epic Throwback Pic

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The actress reflects on her 'incredible journey' on the hit supernatural series.

We don't think anyone can beat Sarah Michelle Gellar's throwback Thursday post!

The 38-year-old actress took to Instagram to share a vintage pic of her on the set of Buffy the Vampire Slayer, which premiered on The WB 19 years ago today.

PHOTOS: Sarah Michelle Gellar Dyes Her Hair in Preparation for 'Cruel Intentions' Sequel

It's hard to believe it's been nearly two decades since Buffy, Angel, Xander, Willow and crew stole our hearts, but thanks to Gellar, fans were reminded of why we fell in love with the Joss Whedon-created supernatural series in the first place.

"19 years ago tonight, I got to introduce you to #buffyannesummers (and #mrpointy too)," she captioned the snap. "Thank you for taking the incredible journey with me and continuing still. I am and forever will be #grateful."

NEWS: A 'Cruel Intentions' Follow-Up Is Coming to TV!

Gellar's Buffy post isn't the only way she's making her fans feel nostalgic, however. The actress is currently gearing up for NBC's Cruel Intentions TV reboot, in which she'll reprise her role as the seductive, deceiving Kathryn Merteuil, the part she made famous in the 1999 film of the same name.

In preparation, she's already dyed her blonde locks back to brown!

"#brownhairdontcare (actually kind of love it!!)," she captioned a pic of her darker tresses on Instagram earlier this month. "Thank you everyone @andylecomptesalon."

She also shared a photo of the script from the show's pilot episode, writing, "How I am spending the 17 anniversary of the release of #cruelintentions #Crueltv."

WATCH: Sarah Michelle Gellar Will Reprise Her 'Cruel Intentions' Role in Sequel

As ET previously announced, the Cruel Intentions follow-up will focus on the same story line as the theatrical teen drama, just 15 years later. The reboot will be set in present day, centering on Bash Casey (portrayed by American Crime star Taylor John Smith), the 16-year-old son of Sebastian Valmont and Annette Hargrove, originally played by Ryan Phillippe and Reese Witherspoon, respectively.

To hear more on Gellar's role in the highly anticipated sequel, watch the video below.