Mercedes Alicia McNab is a Canadian-born actress perhaps best known for playing vampire Harmony Kendall on Buffy the Vampire Slayer and its spinoff Angel.
Before her television work, McNab played a Girl Scout selling cookies in one of the better-known scenes from the 1991 film The Addams Family. She enjoyed a more prominent role as a stuckp summer camp resident in its 1993 sequel, Addams Family Values. She posed nude for, and was on the cover of the November 2006 issue of Playboy magazine. McNab also appeared in the January 2004 issue of FHM magazine.
An only child, McNab was born in Vancouver, British Columbia; her father is former English football player Bob McNab.