Michelle Trachtenberg’s friends and costars react to the ‘Buffy’ and ‘Gossip Girl’ star’s sudden death at 39: ‘I wish I could have helped’

• Michelle Trachtenberg was found dead on Wednesday morning. She was 39.
• She began her acting career as a child star and is best known for “Buffy” and “Harriet the Spy.”
• Trachtenberg’s famous friends and former costars paid tribute to the actor.

After Michelle Trachtenberg’s death on Wednesday morning, celebrities and fans are paying tribute.

The NYPD told Business Insider that Trachtenberg had been found dead in a luxury apartment in Manhattan near Central Park. No cause of death has been given, and authorities said they’re not treating the death as suspicious.

Trachtenberg, who began acting in commercials at age 3, had a decadeslong career in Hollywood, appearing in memorable films like “Harriet the Spy” and “EuroTrip” and TV series like “Buffy the Vampire Slayer” and “Gossip Girl.” As the news of her death spread, her famous friends and former costars shared their reactions and heartfelt messages online.