Is that you, Sarah Michelle Gellar?!

The 40-year-old actress is switching up her look just in time for summer! Sarah Michelle is welcoming the sunshine with newly-dyed platinum locks and swoopy bangs in her latest Instagram photo posted on Thursday, June 8.

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She captioned the pic, "Got my hair did… and now I'm ready for summer. So summer… I'm waiting! #JuneGloom."

At first glance, it'd be easy to pass this photo without even realizing it is Sarah Michelle — and her fans were quick to voice their opinions of her new look on Instagram. One wrote, "This makes me miss Buffy the Vampire Slayer. I love blonde hair on you!" Another added, "Oh my goodness you look like a teenager! Good for you!!!"

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It's true that the actress is aging remarkably well. In 2015, she candidly revealed that wrinkles don't worry her. Instead, she focuses on having a positive outlook on life.

"Honestly, I don't care what they say about smiling causing wrinkles, happiness is my key to everything," she said. "Glowing definitely works from the inside out. That being said, water, keeping yourself moving, and sleep are definitely important."

Whatever her secret is… it's clearly working for her!

Click through the gallery below to see more celeb hair transformations!