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

KNOWN FOR

Grey's Anatomy
2018
CSI: Miami
2007
Blue Bloods
2010
Lucifer
2016
Station 19
2018
Girlfriends
2000
Sister, Sister
1994
Moesha
1997
Masters of Sex
2013
One on One
2001
New York Undercover
1994
Steve Harvey
2014

FILMOGRAPHY

All
Movies
TV
Acting
60
Producing
2
2026
Unrequited
as Erik
2025
Carl Weber's The Family Business
as Low Jack
2023
The Assistant
as Shawn Fields
2023
Carl Weber's The Black Hamptons
as Devon aka Lojack
2021
mixed-ish
as George
2021
Kenan
as Derek
2020
Ballbuster
as Luther
2020
Trigger
as Michael Mass
2019
Maybe I'm Fine
as Jeffrey
2018
And I Danced
as Self
2018
Grey's Anatomy
as Evan Forrester
2018
Station 19
as Evan Forrester
2017
Love by the 10th Date
as Preacher Hill
2016
Lucifer
as Simon Hallbrooks
2015
Soul Ties
as Jessie
2015
Gotham Comedy Live
as Self - Host
2014
Steve Harvey
as Self
2013
My Sister's Wedding
as Matthew
2013
24 Hour Love
as Bradford
2013
The Client List
as The Wolf
2013
Masters of Sex
as Walter
2010
Blue Bloods
as Demarcus King
2007
Poor Boy's Game
as Ossie Paris
2007
The List
as Chet
2007
Love and Other Four Letter Words
as Arnold
2007
The Hills Have Eyes 2
as Sarge
2007
Snakes on a Blog
as Self
2007
Snakes on a Plane: Meet the Reptiles
as Self
2007
Snakes on a Set: Behind the Scenes
as Self
2007
The Snake Pit: On the Set of 'Snakes on a Plane'
as Self
2007
CSI: Miami
as Beau Lendell
2006
Snakes on a Plane
as Three G's
2006
Pure Venom: The Making of Snakes on a Plane
as Self
2005
Her Minor Thing
as Marty
2005
Shira: The Vampire Samurai
as Small Change Willie (as Flex)
2005
Cuts
2004
Gas
as Damien
2004
Man in the Mirror: The Michael Jackson Story
as Michael Jackson
2004
Sweet Oranges
as Himself
2004
On Air with Ryan Seacrest
as Celebrity Courtyard Correspondent
2001
Out Cold
as Anthony
2001
One on One
as Flex Washington
2000
Girlfriends
as Darnell Wilkes
2000
The Parkers
1999
Santa and Pete
as Pete
1999
The Apartment Complex
1999
She's All That
as Kadeem
1998
Ice
as Kelvin
1998
Modern Vampires
as Trigger
1997
City of Industry
as A Roc
1997
The 6th Man
as Jerrod Smith
1997
Moesha
as Dread
1997
Brooklyn South
as Buster
1997
Total Security
1996
Homeboys in Outer Space
as Tyberius Walker
1995
Money Train
as Hood
1994
Sister, Sister
as Cold Dog
1994
New York Undercover
1993
Where I Live
1992
Juice
as Contest Auditioner