It’s funny how everyone commenting so far seems to have a different movie they remember her from. Despite watching way more Buffy, Harriet the Spy is what I first think of.
Crazy she needed a liver transplant and died so young.
I know her from several things (I didn't watch Buffy), but Harriet the Spy is also my first thought. I will always think of that movie when I see those damn black and white journals too.
I literally just looked her up last week and she hadn't been doing too well in recent years. Of course the Internet being the shithead it is was heckling her for not looking like a pristine perfect celeb. I hope it wasn't related to suicide. Crushed on her hard back when she was in Buffy and Eurotrip and she always seemed bright and fun.
My heart goes out to all of the people she loved and who loved her. For all that Dawn wasn't a character I liked, I never, ever doubted Michelle as a great actress. She deserved better for her life.