David Emmett Cockrum (November 11, 1943 – November 26, 2006) was an American comic book artist known for his co-creation of the new X-Men characters Nightcrawler, Storm, and Colossus. Cockrum was a prolific and inventive costume designer who updated the uniforms of the Legion of Super-Heroes. He did the same for the new X-Men and many of their antagonists in the 1970s and early 1980s.