Michelle Trachtenberg's mom talked to her the night before she was found unresponsive in her New York City apartment, according to a new TMZ report. The NYPD previously confirmed to PEOPLE that officers responded to a 911 call at 1 Columbus Place in New York City around 8:00 a.

Michelle Trachtenberg’s mom last saw her daughter alive just 10 hours before she found the “Gossip Girl” star dead in her New York City apartment, according to a report.

The longtime actress, who passed away at 39, underwent a liver transplant before her death. Learn more about her health and the challenges she endured.