Actor Michelle Trachtenberg, known for her starring roles in Buffy the Vampire Slayer and Gossip Girl has died at the age of 39. Trachtenberg, who starred in a myriad of 90s and 2000s TV shows and movies,

O’Donnell and Trachtenberg appeared together in the 1996 film “Harriet the Spy,” the late actor’s first leading role.

Rosie O’Donnell has broken her silence over the death of her “Harriet the Spy” co-star Michelle Trachtenberg. The “A League of Their Own” star, 62, called Trachtenberg’s sudden passing “heartbreaking.

O’Donnell was Trachtenberg’s A-list co-star in Harriet the Spy, the 1996 kids movie that marked Trachtenberg’s first major film role (she was just 10 when filming began). O’Donnell played “Ole Golly,” a nanny and mentor to Harriet, the precocious snoop and writer played by Trachtenberg.

Following the heartbreaking news that the “Buffy the Vampire Slayer” star died Wednesday at the age of 39, friends and former colleagues took to social media to honor the late actress.

Michelle Trachtenberg got emotional about starring in 'Harriet the Spy' with Rosie O'Donnell on the film's 25th anniversary.

Rosie O’Donnell reacted to the death of actress Michelle Trachtenberg, her costar in the 1996 movie ‘Harriet the Spy’

News of Michelle Trachtenberg's death prompted tributes from her friends and former "Buffy," "Harriet the Spy," and "Gossip Girl" costars.

Blake Lively, Rosie O’Donnell lead tributes to Gossip Girl and Harriet the Spy star - Kim Cattrall, Kenan Thompson and Trachtenberg’s ex-boyfriend have also paid tribute

Following Michelle Trachtenberg’s sudden death at the age of 39, Rosie O'Donnell and Ed Westwick were among the Gossip Girl actress' former costars to pay tribute.

Rosie O’Donnell, who starred alongside Trachtenberg ... Michelle Trachtenberg’s Gossip Girl co-star Ed Westwick has reacted to the news of her untimely passing. Westwick, 37, who starred ...

The New York Medical Examiner is investigating the cause of death, Rosie ... debut. O’Donnell portrayed Ole Golly, Harriet’s whimsical nanny. Michelle Trachtenberg’s Gossip Girl co-star ...