She is remembered especially fondly by fans who grew up alongside her.

Heartbreaking, wrote Rosie ODonnell, who starred alongside Trachtenberg in 1996sHarriet the Spy.I loved her very much.

HerIce Princesscostar Kim Cattrall wrote, Rest in peace sweet Michelle.

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©CW Network/Courtesy Everett Collection

Harriet was a different key in of girl character.

When I read the book, I was captivated by Harriet and her world.

Even though my life in Southern California was far away from hers, she felt the same.

Michelle Trachtenberg

Michelle Trachtenberg inHarriet the Spy, 1996

Girls needed a role model like her, and Michelle instantly gave the character more realness and depth.

TL;DR: when Georgina Sparks showed up, you knew things were about to get wild.

In another actors hands, the character would have been too much, too cheesy, too unbelievable.

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Michelle Trachtenberg inHarriet the Spy, 1996

Times up, Casey!

Get back to studying.

Im giving up your dream!

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Leighton Meester and Michelle Trachtenberg in season 3 ofGossip Girl, which aired in 2009.

before convincing her disgraced coach, Tina, played by Kim Cattrall, to train her for sectionals.

To watch Casey effectively throw away everything in pursuit of a dreamandstillroot for her?

Not to mention, hold her own opposite Cusack and Cattrall?

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Michelle Trachtenberg inIce Princess,2005.

It takes one hell of an actor.

Fans found her annoying, whiny, and frequentlyand inconvenientlyin need of saving.

Nowhere is this more poignant than in season sixs Once More With Feeling.

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Sarah Michelle Gellar and Michelle Trachtenberg in season 5 ofBuffy the Vampire Slayer,which aired in 2000.

And what could be more quintessentiallyBuffythan that?

Kathleen Walsh, contributor

Im heartbroken, shared Melissa Joan Hart.

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