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."
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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.
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.