- Album" Recorded the complete sonnets of William Shakespeare in a multi-LP box set, and played Scrooge in a famous 1941 American Decca recording of Charles Dickens's "A Christmas Carol". The "Christmas Carol" recording became a classic and was reissued on LP throughout the 1950s and '60's. It has recently been released by Deutsche Grammophon on CD.
- (1958) Unsold pilot: Starred in a pilot for an anthology series to be called "Portrait".
- (1946) Album: He re-created his film role of Robert Conway in Lost Horizon (1937) on a three-record 78-RPM adaptation of the film released by Decca. This was a much-altered version written and directed by George Wells. It changed Conway's brother into merely his assistant, omitted Sondra, Conway's love interest, reduced the amount of passengers who crash-land in Shangri-La along with Conway, and changed their names of several of the characters. Colman narrated this version.
- (1921 - 1922) Active on Broadway in the following productions:
- (1921) Stage Play: The Green Goddess. Melodrama. Written by William Archer. Directed by Winthrop Ames. Booth Theatre: 18 Jan 1921- Jun 1921 (closing date unknown/175 performances). Cast: George Arliss (as "The Raja of Rukh"), Ronald Colman (as "The Temple Priest") [Broadway debut], Cyril Keightley (as "Dr. Basil Traherne"), David A. Leonard (as "The High Priest"), Helen Nowell (as "An Ayah") [only Broadway role], Herbert Ransome (as "Lieut. Denis Cardew"), Ivan F. Simpson (as "Watkins"), Herbert Waring (as "Major Antony Crespin"), Olive Wyndham (as "Lucilla"). Produced by Winthrop Ames. Note: Filmed by Distinctive Productions [distributed by Goldwyn-Cosmopolitan Distributing Corporation] as The Green Goddess (1923), by Warner Bros/Vitaphone Corp. as The Green Goddess (1930), by RKO Vaudeville Circuit [distributed by RKO Radio Pictures] as The Green Goddess (1939) [short subject, directed by Orson Welles], and by Warner Bros. as Adventure in Iraq (1943).
- (1921) Stage Play: The Nightcap. Comedy/mystery. Written and directed by Guy Bolton and Max Marcin. 39th Street Theatre: 15 Aug 1921- Nov 1921 (closing date unknown/96 performances). Cast: Halbert Brown (as "Coroner Watrous), Ronald Colman (as "Charles"), Wilson Day (as "Rev. Dr. Forbes"), H. Dudley Hawley (as "Lester Knowles"), Walter Horton (as "George Rainsford"), Grant Mills (as "Fred Hammond"), John Daly Murphy (as "Jerry Hammond"), Jerome Patrick (as "Robert Andrews"), Jack Raffael, Elisabeth Risdon (as "Mrs. Lester Knowles"), Flora Sheffield, W.W. Shuttleworth, John Wray (as "Policeman"). Produced by Max Marcin. Note: Filmed as Universal Pictures as Secrets of the Night (1924).
- (1922) Stage Play: La Tendresse. Drama. Written by Henri Bataille. Directed by Henry Miller. Empire Theatre: 25 Sep 1922- Nov 1922 (closing date unknown/64 performances). Cast: A.G. Andrews (as "Guerin"), Elmer Brown, Ruth Chatterton (as "Marthe Dellieres"), H. Cooper Cliffe (as "Fernal"), Ronald Colman (as "Alain Sergyll") [final Broadway role], Jean De La Cruz (as "Count de Jalligny"), Florence Fair, Elfin Finn, Mary Fowler, William Hanley (as "Julian d'Ablincourt"), Norma Havey, Louis Le Bay, Edward MacKay (as "Legardier"), Henry Miller (as "Paul Barnac"), William Pearce, Sidney Riggs, Marguerite St. John.
- (1947-49) Radio: Hosted the series "Favorite Story".