Birth Date: April 15, 1970 / Age: 46
Birth Place: New York City, New York, USA
Also Credited as: Mark 'Flex' Knox
Biography: Mark "Flex" Alexander (born April 15, 1970 in New York City, New York) is an African-American actor and comedian.
He is best known as the star of the UPN sitcom One on One with Kyla Pratt. Alexander is also notable for protraying Michael Jackson in the 2004 VH-1 telefilm Man in the Mirror: The Michael Jackson Story.
Alexander is married to R&B singer Shanice, with whom he has two children.