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

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.

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