Jamil Walker Smith is an American actor best known for his starring role as Ronald Greer in the science fiction television series Stargate Universe, from 2009-2011.
Smith started his acting career at the age of six, performing in local theatre in his native Ventura, California.
His first gig in the business was at the age of 12, guest starring in an episode of the self-titled sitcom The Sinbad Show.
From there Smith has appeared in series as diverse as NYPD Blue, The Bernie Mac Show, Supernatural, Touched by an Angel, Girlfriends and Bones.
He was also a recurring voice on the animated series Hey Arnold!.