John Boles was an American singer and actor best known for playing Victor Moritz in the 1931 film Frankenstein.

Frankenstein is a 1931 American pre-Code science fiction horror film directed by James Whale, produced by Carl Laemmle Jr., and adapted from a 1927 play by Peggy Webling, which in turn was based on Mary Shelley's 1818 novel Frankenstein; or, The Modern Prometheus. The Webling play was adapted by John L. Balderston and the screenplay written by Francis Edward Faragoh and Garrett Fort, with uncredited contributions from Robert Florey and John Russell.