Cheyenne Jackson (born July 12, 1975) is an American actor and singer. He started in regional theater when he moved to Seattle, and after moving to New York City, made his 2002 Broadway theatre debut understudying both male leads in the Tony Award-winning musical Thoroughly Modern Millie. In 2005, he originated his first Broadway leading role in All Shook Up earning him a Theatre World Award for "Outstanding Broadway Debut".

In films, Jackson portrayed 9/11 victim and hero Mark Bingham in the 2006 Academy Award nominated United 93 which earned him the Boston Society of Film Critics 2006 award for "Best Ensemble Cast". He has also appeared in the films Curiosity (2005), Hysteria (2010), The Green (opposite Julia Ormond and Illeana Douglas), and Price Check (with Parker Posey).