Mercedes McNab etched out a memorable late-'90s small-screen characterization when she signed to work for producer/series creator Joss Whedon on the cult fantasy series Buffy the Vampire Slayer, opposite Sarah Michelle Gellar. As the brilliantly named Harmony Kendall -- a spoiled, well-to-do Southern California prima donna whose life turns a nasty corner when she gets inadvertently vampirized, McNab provided an all-too-familiar high school archetype (with and without the ghastly makeup) amid the series' themes of adolescent angst. She continued her portrayal of Harmony on the spin-off series Angel, moving up from recurring character to regular during the show's fifth and final season. McNab continued on with guest roles on TV shows like Reaper and Supernatural, and also moved into features. In 2006, the actress took on a plum role in the 2006 slasher movie Hatchet.