And though Trachtenberg would go on to other prominent roles — like the bad girl socialite Georgina Sparks in “Gossip Girl” — for me, Dawn remains Trachtenberg’s most me

Michelle Trachtenberg, the actress who rose to fame as a child star with films like “Harriet the Spy” and went on to have memorable roles on TV shows including “Gossip Girl,” has died, according to an NYPD source.

Michelle Trachtenberg, the actor known for “Gossip Girl,” “Buffy the Vampire Slayer” and “Harriet the Spy” died Wednesday. She was 39.