Michelle Trachtenberg’s former “Buffy the Vampire Slayer” costar Sarah Michelle Gellar is looking back at their time together on screen and off, one day after Trachtenberg died in New York City.

Blake Lively, Sarah Michelle Gellar and others who worked with Michelle Trachtenberg remembered the “loving” and “electric” actress, who was found dead in her NYC apartment

Rosie O’Donnell, who starred alongside Trachtenberg in Harriet the Spy, told People she “loved her very much. She struggled the last few years. I wish I could have helped. J