Hollywood is paying tribute to Michelle Trachtenberg. The actor who starred in 'Harriet the Spy,' 'Buffy the Vampire Slayer' and 'Gossip Girl' died at 39.

The late actress starred in Gossip Girl, Harriet the Spy, played Buffy's younger sister in Buffy, The Vampire Slayer, and even appeared in a Fall Out Boy video.

Comedian and former Nickelodeon child star Kenan Thompson shared a video on Instagram of the two of them on Nick, writing: “Our first Nick movie star has departed us!! She was my friend and now she ...