Harry Cyril Delevanti (23 February 1887 – 13 December 1975) was an English character actor with a long career in American films.

From the 1940s, he appeared in many small roles, frequently uncredited, in such films as Phantom of the Opera (1943), Confidential Agent (1945), Deception (1946), Monsieur Verdoux (1947), Forever Amber (1947), David and Bathsheba (1951), Limelight (1952), Les Girls (1957), Bye Bye Birdie (1963), and Mary Poppins (1964).

In 1958, Delevanti was cast as the printer Lucius Coin in all twenty-six episodes of the NBC western television series, Jefferson Drum, starring Jeff Richards.

Delevanti made guest-starring appearances on Dennis the Menace, US Marshal, The Fugitive, Gunsmoke, The Dick Van Dyke Show, Have Gun – Will Travel, The Tall Man, Bourbon Street Beat, Voyage to the Bottom of the Sea, The Virginian, Daniel Boone, Alfred Hitchcock Presents, Mission: Impossible, Ironside, The Untouchables; Science Fiction Theater, Adventures of Superman; The Twilight Zone (in the episodes "A Penny for Your Thoughts", "The Silence", "Passage on the Lady Anne", and "A Piano in the House"), Dundee and the Culhane, Peter Gunn, and Dragnet.

[citation needed] He continued to act in films, such as The Night of the Iguana (1964, nominated for a Golden Globe Award as Best Supporting Actor), Mary Poppins (1964), The Killing of Sister George (1968), and Bedknobs and Broomsticks (1971).