David Jason Muir is an American journalist and anchor for
ABC World News Tonight and co-anchor of the ABC News magazine
20/20, part of the news department of the ABC broadcast-television network, based in New York City. Muir previously served as the weekend anchor and primary substitute anchor on ABC's World News Tonight with Diane Sawyer before succeeding her on September 1, 2014. At ABC News, Muir has won multiple Emmy and Edward R. Murrow awards for his national and international journalism. He was the 2024 recipient of the Walter Cronkite Award for Excellence in Journalism.