Ken Leung was raised in the Two Bridges section of the Lower East Side in New York City. His family moved to Midwood, Brooklyn where he grew up before finishing high school in Old Bridge, NJ. He attended NYU as a University Scholar and discovered acting junior year. He studied with Catherine Russell and Nan Smithner at NYU and briefly with Anne Jackson at HB Studio. He acted mostly in downtown spaces and black boxes, finding artistic homes with groups such as Ma-Yi, New Perspectives, and STAR, a traveling group of actors-educators based in Mt Sinai Hospital that created theatre which facilitated dialogue with youths about sex and other matters. In 1997, Brett Ratner cast him in Rush Hour, starring Jackie Chan and Chris Tucker. Edward Norton cast him in his directorial debut, Keeping the Faith. Since then he has appeared in several independent and tv films, as well as features, including four films with Ratner and two with Spike Lee. Other directors include Sydney Lumet, Steven Spielberg, and Todd Solondz. In 1998, he played God in Terrence McNally's passion play, Corpus Christi, and in 2002 made his Broadway debut in the Tony Award winning musical, Thoroughly Modern Millie. Stage directors include Austin Pendleton, Loy Arcenas, Ralph Peña, and Jeff Weiss.

Made his Broadway debut as Ching Ho in the 2002 Tony Award winning musical "Thoroughly Modern Millie."

Frequently works with Brett Ratner