Kenneth Leung is an American actor best known for his roles in popular movies such as Shanghai Kiss, Saw and X-Men: The Last Stand. Most recently Leung became known for his starring role as Miles Straume in the popular Abcdrama television series Lost.

He was born in New York City and initially raised in the Two Bridges section of the Lower East Side of Manhattan. His family moved to Midwood, Brooklyn where he grew up before finishing high school in Old Bridge, New Jersey.

Leung later attended New York University (NYU) as a University Scholar and discovered acting in his junior year, when he studied acting with Catherine Russell and Nan Smithner, then briefly with Anne Jackson at HB Studio. During this time he also 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 Mount Sinai Hospital.

In 1997, Leung made his debut in Brett Ratner's Rush Hour. Edward Norton cast him in his directorial debut Keeping the Faith in 2000. Since then Leung has appeared in several independent and television films, as well as features, including four films with Brett Ratner and two with Spike Lee. In 1998, he played James the Less and 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 (and appears on the cast recording).

In 2007, he starred in the independent film Shanghai Kiss with Hayden Panettiere and earned a Special Mention at the San Francisco International Asian American Film Festival for his breakthrough performance. That same year he guest-starred in one episode of the final season of the HBO drama series The Sopranos. This memorable guest role inspired the producers of the Abcdrama Lost to cast him in a regular role as Miles Straume in the series' fourth season.