Justin Shenkarow is an American actor, producer, director and writer, best known for his roles of Matthew Brock in Picket Fences, Simon Holmes in Eerie, Indiana, and the voice of Harold Berman from the Nickelodeon animated series, Hey Arnold!.

He received three Young Artist Award nominations for his work as an actor on Picket Fences.

He has starred in television shows including Eerie, Indiana, Home Improvement, The Fresh Prince of Bel-Air, Strong Medicine, and Boston Public.

Shenkarow's production company, Shake That Fro Productions, has produced three short films in 2006 which he wrote, produced, directed and starred in, Decoy, The Best Christmas Ever and Tears.

In 2005 he appeared in two films, House of the Dead 2 and Comedy Hell co-starring Eric Roberts.