Michelle Trachtenberg's death Wednesday left her former co-stars like Blake Lively, Rosie O'Donnell, Melissa Gilbert and ...

Gossip Girl star Blake Lively has shared a poignant tribute to her late co-star Michelle Trachtenberg, who passed away ...

Blake Lively, Rosie O'Donnell and other Hollywood figures are paying tribute to Michelle Trachtenberg, who died at 39.

Blake Lively is mourning her "fiercely loyal" and "brave" Gossip Girl costar Michelle Trachtenberg after her death at age 39.

Michelle Trachtenberg's co-stars and fellow celebrities are speaking out after the "Gossip Girl" and "Harriet the Spy" star ...

Blake Lively, David Boreanaz, Ed Westwick, Kim Cattrall, Kenan Thompson, Melissa Joan Hart and more shared tributes to ...

Blake Lively took to her Instagram Stories Wednesday evening to share a lengthy tribute to her "Gossip Girl" costar Michelle ...

Lively shared a photo of the day she met Trachtenberg, writing, "The world lost a deeply sensitive and good person" ...

Blake Lively, who co-starred with Michelle Trachtenberg on the teen drama "Gossip Girl," paid tribute to the late actress on ...

Blake Lively is among Michelle Trachtenberg’s devastated co-stars who have led celebrity tributes following her death at the ...

Michelle Trachtenberg, famed for roles in Harriet the Spy and Buffy the Vampire Slayer, died at 39. Found unresponsive in her ...

Taking to her Instagram stories, she wrote a long post remembering her co-star. Trachtenberg and Lively both appeared in the ...