Greg2600 · CC BY-SA 2.0

An American actress who spent two decades moving fluently between teen and family entertainment: Dawn Summers, Buffy the Vampire Slayer's abruptly-appearing younger sister, and Georgina Sparks, the scheming rival on Gossip Girl, bookending a run that began in commercials at age three and included Harriet the Spy and EuroTrip. She died in February 2025 at 39, midway through a career that had recently expanded into voice work and producing.