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

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,

She struggled the last few years. I wish I could have helped."Trachtenberg was found unconscious and unresponsive in her New York City apartment just after 8 a.m. Wednesday, when police and emergency medical workers responded to a 911 call.