Web Reference: Mark Alexander Knox (born April 15, 1970), better known as Flex Alexander or Flex, is an American actor, comedian and dancer. He began his career while appearing on numerous of television sitcoms before portraying single father Flex Washington on the UPN sitcom One on One (2001–2006). Flex Alexander's Height 6ft 3 ½ (191.8 cm) American actor best known for roles in films Out Cold, Snakes on a Plane, Man in the Mirror, The Hills have Eyes 2 and TV series One on One. He once said, "I'm 6-foot-4" Jan 4, 2024 · Flex Alexander is an American actor, comedian, and dancer. He portrayed Detective DeMarcus King in the Pilot episode of the CBS crime drama television series Blue Bloods.
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Details: $30M - $54M
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Last Updated: April 7, 2026
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