Trachtenberg co-star David Boreanaz

‘Buffy the Vampire Slayer’ and ‘Harriet the Spy’ star Michelle Trachtenberg dies at 39 NEW YORK (New York) — Michelle Trachtenberg, a former child actor who appeared in the hit 1996 film “Harriet the Spy” and later co-starred in two humorous millennial-era TV shows — “Buffy the Vampire Slayer” and “Gossip Girl,” has died. She…