From Wikipedia the free encyclopedia Jamil Walker Smith born August 20 1982 is an American actor His best known role is as the voice of Gerald a fourth grader and Arnolds best friend in the Nickelodeon TV series Hey Arnold He also appeared on various shows like Sister Sister Girlfriends Bones The XFiles and The Bernie Mac Show He is an actor by trade and writes acts and directs his own short film projects He recently portrayed Master Sergeant Ronald Greer in the third series of the Stargate franchise Stargate Universe Description above from the Wikipedia article Jamil Walker Smith licensed under CCBYSA full list of contributors on Wikipedia
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