Rosie O’Donnell paid tribute to her former co-star, Michelle Trachtenberg, who was found dead in her New York City apartment on Wednesday. “Heartbreaking,” O’Donnell said in a statement to Us Weekly. “I loved her very much.”

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

Rosie O'Donnell in the 1996 movie News of Michelle Trachtenberg’s tragic death on Feb. 26 at the age of 39 is bound to hit fans of Harriet the Spy particularly hard. The actress was just 10 years old when she made her film debut in the 1996 movie based on the beloved 1964 children’s novel,