Ian Roberts (born 29 July 1965 in New York City) is an actor and comedian. He was one of the founding members of the Upright Citizens Brigade, and after the Comedy Central show, went on to be in films like , Bring It On, and Talladega Nights: The Ballad of Ricky Bobby. He also starred in the hit sitcom Arrested Development as a "Literal Doctor" (whose choice of words often confuses the other characters).
Ian G. Roberts (born October 23, 1957 in Stamford, Lincolnshire, England) is Professor of Linguistics at the University of Cambridge.
Ian Roberts (born on October 28, 1958 in Victoria, British Columbia) competed in the 2004 Summer Olympics for Canada in equestrian events.