"My Little Margie" premiered on CBS as the first summer replacement for "I Love Lucy" on June 16, 1952, under the sponsorship of Philip Morris cigarettes (when the series moved to NBC for its third season in the fall of 1953, Scott Paper Company became its sponsor). In an unusual move, the series—with the same leads—aired original episodes on CBS Radio, concurrently with the TV broadcasts, from December 1952 through August 1955. Only 23 radio broadcasts are known to exist in recorded form.