Actress Michelle Trachtenberg was known for many famous roles, but only one was her true favorite. The star, who died at the age of 39 on Wednesday, February 26, played Dawn Summer, kid-sister of Buffy the Vampire Slayer's titular character,

Michelle Trachtenberg, an American actress who rose to prominence as a child in the 1990s and 2000s, has passed away at the age of 39.

Actress Michelle Trachtenberg, known for "Buffy" and "Gossip Girl," died at 39 in NYC under non-suspicious circumstances. Her recent liver transplant was cited as a natural cause of death.