Christopher "Chris" Hillman (born December 4, 1944 in Los Angeles, California, United States) is an American musician. He was one of the original members of The Byrds, which in 1965 included Roger McGuinn, Gene Clark, David Crosby and Michael Clarke. With frequent collaborator Gram Parsons, Hillman was a key figure in the development of country rock, defining the genre through his work with The Byrds, The Flying Burrito Brothers, Manassas and the country-rock group Desert Rose Band.