ET chatted with the star in New York City on Tuesday about her new book, 'Stirring Up Fun With Food,' out April 4.
ET chatted with the foodie in the Good Housekeeping test kitchen as she whipped up cake from her new organic brand, Foodstirs.
The actress was only 19 years old during the show's first season.
From 'The Prom' to evil Willow, relive the best moments from Sunnydale!
It's been 20 years since Buffy Summers went from your average teenage girl to vampire slaying heroine.
In honor of the show's 20th anniversary, ET is taking you behind-the-scenes of of the 1999 episode when Buffy saved prom.
Looking back on the WB series that not only changed TV but changed the course for all those involved, particularly creator Joss Whedon.
The internet was not impressed with the Britney Spears biopic. Just ask Sarah Michelle Gellar...
Shannen caught Sarah Michelle Gellar on the floor after their workout.
Sarah Michelle Gellar's 4-year-old son Rocky was admitted to the hospital for an apparent 'nasty virus.'
The 'Cruel Intentions' star said it was 'a long night.'
Celeb pals including Sarah Michelle Gellar and Chelsea Handler turned out to support the actress.
The actresses both shared a photo to commemorate the day.
Plus, find out what other TV shows and which celebrities are celebrating coffee's big day.