Warren Girard Ellis (born 16 February 1968) is a British comic book writer, novelist, and screenwriter. He is best known as the co-creator of several original comics series, including Transmetropolitan (1997–2002), Global Frequency (2002–2004) and Red (2003–2004), which was adapted into the feature films Red (2010) and Red 2 (2013). Ellis is the author of the novels Crooked Little Vein (2007) and Gun Machine (2013) and the novella Normal (2016).