Helen Louise Prettyman Arnold (August 17, 1890 – February 19, 1976[1]) was an American silent film actress who appeared in motion pictures from 1916 to 1918.

Arnold was a member of the cast of the 1891 production of "Nerves" at the Lyceum Theatre in New York City.

Arnold played Viola Campbell in a 1916 production of The Witching Hour filmed in Flushing, New York.

[4] In June 1916, Arnold was among the winners of a Beauty and Brains contest held by Photoplay magazine.

[7] Arnold made two other Hollywood films, One Law For Both (1917) and The Call of Her People (1917), which starred Ethel Barrymore.