Dawn Summers on 'Buffy the Vampire Slayer' was magical energy turned human. Michelle Trachtenberg made her everyone's kid sister.

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,

Actress Michelle Trachtenberg, who rose to fame as a child star in the 1990s and 2000s, has died aged 39. Police in Manhattan said they responded to an emergency call on Wednesday morning and found Trachtenberg "unconscious and unresponsive". She was pronounced dead at the scene.