Sarah Michelle Gellar, Taylor Momsen and Blake Lively are among those paying tribute to Michelle Trachtenberg, who died Wednesday. Trachtenberg was found in her New York apartment “unconscious and unresponsive,

Time passes. You take for granted you get the chance to see an old friend. To paraphrase, the real tragedies in life are the ones that blindside you on an idle Tuesday,” Lively wrote

Actor Melissa Gilbert, who acted alongside Trachtenberg in A Holiday for Love, honored the late star on Instagram by sharing a picture of the two from the project. “Oh Michy…and we lived so close to one another…..my heart aches for your family and all those who loved you so…” she wrote.