Mark Alexander Knox (born April 15, 1970), better known as Flex Alexander or Flex, is an American actor, comedian and dancer.

Filmography

• 2026Unrequited — Erik
• 2023The Assistant — Shawn Fields
• Carl Weber's The Black Hamptons — Devon aka Lojack
• Kenan — Derek
• 2020Ballbuster — Luther
• 2020Trigger — Michael Mass
• 2019Maybe I'm Fine — Jeffrey
• mixed-ish — George
• Carl Weber's The Family Business — Low Jack
• Station 19 — Evan Forrester
• 2017Love by the 10th Date — Preacher Hill
• Lucifer — Simon Hallbrooks
• 2015Soul Ties — Jessie
• 201324 Hour Love — Bradford
• Masters of Sex — Walter
• 2013My Sister's Wedding — Matthew
• The Client List — The Wolf
• Blue Bloods — Demarcus King
• 2007Love and Other Four Letter Words — Arnold
• 2007Poor Boy's Game — Ossie Paris
• 2007The Hills Have Eyes 2 — Sarge
• 2007The List — Chet
• 2006Snakes on a Plane — Three G's
• Cuts
• Grey's Anatomy — Evan Forrester
• 2005Her Minor Thing — Marty
• 2005Shira: The Vampire Samurai — Small Change Willie (as Flex)
• 2004Gas — Damien
• 2004Man in the Mirror: The Michael Jackson Story — Michael Jackson
• On Air with Ryan Seacrest — Celebrity Courtyard Correspondent
• CSI: Miami — Beau Lendell
• One on One — Flex Washington, Producer, Co-Executive Producer
• 2001Out Cold — Anthony
• Girlfriends — Darnell Wilkes
• 1999Santa and Pete — Pete
• 1999She's All That — Kadeem
• 1999The Apartment Complex
• The Parkers
• 1998Ice — Kelvin
• 1998Modern Vampires — Trigger
• Brooklyn South — Buster
• 1997City of Industry — A Roc
• 1997The 6th Man — Jerrod Smith
• Total Security
• Homeboys in Outer Space — Tyberius Walker
• Moesha — Dread
• 1995Money Train — Hood
• New York Undercover
• Sister, Sister — Cold Dog
• Where I Live
• 1992Juice — Contest Auditioner

Appearances as themselves (9)

• 2018And I Danced — Self
• Gotham Comedy Live — Self - Host
• Steve Harvey — Self
• 2007Snakes on a Blog — Self
• 2007Snakes on a Plane: Meet the Reptiles — Self
• 2007Snakes on a Set: Behind the Scenes — Self
• 2007The Snake Pit: On the Set of 'Snakes on a Plane' — Self
• 2006Pure Venom: The Making of Snakes on a Plane — Self
• 2004Sweet Oranges — Himself