Keith Robinson was born in Kentucky and grew up in Greenville, South Carolina. He later moved to Augusta and graduated from Lakeside High School. He attended the University of Georgia and, while there, signed a recording contract with Motown Records, but that label never issued any of his material.
Robinson moved to Los Angeles and earned a starring role as Joel Rawlings, the Green Ranger in the TV series Power Rangers Lightspeed Rescue. Robinson appeared in other series including "ER" (1994), "American Dreams" (2002), "Monk" (2002), "Half & Half" (2002), and "Over There" (2005).
Robinson's role as C.C. White in Dreamgirls (2006), which includes a Robinson-led version of the song "Family," appears to have been a breakout. He was subsequently cast in "Comanche Moon" (2008) now in post-production, in This Christmas (2007) now filming, The Apostles (2008) (TV) in pre-production and Caught on Tape (2011) now in production.