Claim: Arsenic and Old Lace only has female actresses.
Evidence: Boris Karloff played Jonathan Brewster , who `` looks like Karloff , '' on the Broadway stage , but he was unable to do the movie as well because he was still appearing in the play during filming , and Raymond Massey took his place.
William Henry Pratt -LRB- 23 November 1887 -- 2 February 1969 -RRB- , better known by his stage name Boris Karloff , was an English actor who was primarily known for his typecast roles in horror films that depicted the characters Frankenstein and The Mummy.