In a statement provided to Entertainment Weekly on Wednesday, O'Donnell said of Trachtenberg, "I loved her very much. She struggled the last few years. I wish I could have helped.

Louise Fitzhugh’s 1964 children’s novel Harriet the Spy was brought to life in a 1996 movie of the same name. Harriet (Michelle Trachtenberg) is a precocious sixth-grader who’s destined to be a super-sleuth.

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,