Faith Lehane is a fictional character created by Joss Whedon for the television series Buffy the Vampire Slayer. Played by actress Eliza Dushku, Faith was introduced in the third season of Buffy and was a focus of that season's overarching plot. She returned for shorter story arcs on Buffy and its spin-off, Angel. The character's story is continued in the comic book series Buffy the Vampire Slayer Season Eight, and she also appears in apocryphal material such as other comic books and novels. Faith was set to receive her own spin-off television series after the final season of Buffy, but Eliza Dushku declined the offer, and the series was never made. The character later co-stars in the 25-issue comic book Angel & Faith beginning in August 2011 under the banner of Buffy the Vampire Slayer Season Nine, the story taking place mostly in London and the surrounding area. Seven years after the character's creation, Whedon granted her the surname Lehane for a role-playing game and subsequent material. The last issue of Season Eight was the first source officially confirmed to be canon that referred to Faith by her full name.

Buffy the Vampire Slayer is an American supernatural drama television series created by writer and director Joss Whedon. The concept is based on the 1992 film, also written by Whedon, although they are separate and unrelated productions. Whedon served as executive producer and showrunner of the series under his production tag Mutant Enemy Productions. It premiered on March 10, 1997, on The WB and concluded on May 20, 2003, on UPN.