David Chisum is an American actor. He had his career beginnings in the mid-1990s. During his early years, he made one-episode roles on several TV shows. This includes Ned and Stacey, The Burning Zone, Sliders, USA High, and Melrose Place. In 1998, he made his movie debut in 12 Bucks. He got his first starring role in the late 2000s, playing Miles Laurence on the soap opera One Life to Live. In the 2010s, he continued making guest appearances on the small screen. He also appeared as Greg on 90210 and Thomas Gage on Castle. In 2013, he had a cameo appearance in the film The Hunger Games: Catching Fire. More recently, he played Ronald Collins on Supergirl.