David Greenwalt (born October 16, 1949) is an American screenwriter, director and producer. He was the co-executive producer of Buffy the Vampire Slayer and co-creator of its spinoff, Angel. He is also co-creator of the short-lived cult television show Profit. On June 1, 2007, The Hollywood Reporter announced that he would serve as executive producer and showrunner on Moonlight, a similarly themed vampire detective show. He later had to leave the show prior to its debut for health reasons, but executive producer Joel Silver stated that his imprint would remain: "He worked really hard on the arc of the series. He really helped us focus and get started". After he left Angel to do Jake 2.0, both shows ended up competing against each other on Wednesday nights at 9/8c on The WB and UPN respectively in the 2003–2004 season.
