Father: William Henry McLellan; Mother: Florida McLanathan.
C.M.S. McLellan's melodrama 'Leah Kleschna' was portrayed by Carlotta Nillson in the 1913 silent film version produced by the Famous Players Film Company.
His musical 'The Belle of New York' was made into two Hollywood films, the first in 1919 with Marion Davies, Etienne Girardot and L. Rogers Lytton, and the second in 1952 with Fred Astaire, Vera-Ellen, Marjorie Main and Keenan Wynn.
McLellan is probably best remembered for the musical The Belle of New York and the drama Leah Kleschna.