The Canterville Ghost is a 1944 film directed by Jules Dassin and starring Charles Laughton, Robert Young, Margaret O'Brien, Reginald Owen, Una O'Connor, Frank Faylen, Mike Mazurki and Peter Lawford.
It's out of print, and I can't find it online. That is such a shame!
The New York Times gives it a mixed review. Variety says, "Tight scripting, nimble direction and excellent casting are about equally responsible for the satisfactory results." The Spinning Image says, "MGM’s adaptation of the Oscar Wilde fantasy is wonderful stuff."
Youtube has a remake online in 12 parts. Part 1 is here.