Joseph Hill "Joss" Whedon is an American screenwriter, executive producer, director, occasional composer and actor, and founder of Mutant Enemy Productions. He is best known as the creator and showrunner of the television series Buffy the Vampire Slayer (1997–2003), Angel (1999–2004), Firefly (2002) and Dollhouse (2009–2010), as well as the short f...