Colleagues and friends of Michelle Trachtenberg have paid tribute to the actress, who has died at the age of 39.

SARAH Michelle Gellar has been spotted looking sombre while out for the first time since the death of her Buffy co-star Michelle ... remembering those years with a big smile.

Sarah Michelle ... years with a big smile. Just a terrible loss. Love you." Alyson Hannigan, who played Willow Rosenberg, added: "I am deeply saddened by the news of Michelle’s passing. She brought a ...

Not long after Trachtenberg's shocking passing was confirmed, fellow celebrities and former co-stars began paying tribute to the late actress.

Buffy the Vampire Slayer" star Sarah Michelle Gellar via Instagram ... remembering those years with a big smile. Just a terrible loss. Love you.” — “Gossip Girl” co-star Chace Crawford ...

Sarah, who played the role of Buffy Summers in ... those years with a big smile. "Just a terrible loss. Love you." Meanwhile, Kelly Rutherford shared a snap of Michelle and simply added some ...