Reginald Denny (birth name Reginald Leigh Dugmore) (20 November 1891 – 16 June 1967) was an English stage, film, and television actor.

Born in Richmond, Surrey, England, he began his film career in 1915 and made films both in the US and England until the 1960's . He came from a theatrical family who came to the US in 1912 to appear in the stage production Quaker Girl. His father was the actor and singer W. H. Denny.

Denny was a well known actor in silent films and with the advent of Talkies he became a character actor. He played a lead role in a number of his earlier films, generally as a comedic Englishman, and later had reasonably steady work as a supporting actor in dozens of movies, including Anna Karenina with Greta Garbo, The Little Minister with Katharine Hepburn, and the Frank Sinatra caper movie Assault on a Queen.

Later, Denny made frequent appearances in television during the 1950s and 60's. His last role was in Batman: The Movie (1966) as Commodore Schmidlapp.

Sometime in the early 1930s, Denny was between scenes on a movie set when he met a neighborhood boy who was trying to fly a bulky gas-powered model plane. When he tried to help by making an adjustment on the machine, Denny succeeded only in wrecking it. But this launched his infatuation with model aviation, and his new hobby grew into Reginald Denny Industries, maker of model plane kits. When the U.S. Army began hunting for a better and safer way to train anti-aircraft gunners than using targets towed by piloted planes, Denny and his associates Walter Righter and Paul Whittier began work on a radio-controlled target drone, and their third prototype won them an Army contract. Radioplane was formed in 1940, and during WWII produced nearly 15,000 target drones (the RP-5A) for the Army. Radioplane was later purchased by Northrop in 1952.