Ainslee was born in 1890, in Kansas City, MO.
One of the silent era's great practitioners of that soon-to-be obsolete specialty; title writing, Marian Ainslee, like so many screenwriters, came from the field of journalism. A reportorial staff writer in both Kansas City and St. Louis, MO, Ainslee began writing titles for independent producer Louis B. Mayer, remaining with Mayer through his mergers with Metro and Goldwyn.
In the end, she titled/wrote over four dozen motion pictures; many of those films released in the early 1920's.
Our Dancing Daughters co-written by Ainslee, is a 1928 American silent drama film starring Joan Crawford and John Mack Brown (later billed after a career decline as "Johnny Mack Brown"), about the "loosening of youth morals" that took place during the 1920s. The film was directed by Harry Beaumont and produced by Hunt Stromberg. This was the film that made Joan Crawford a major star, a position she held for the following half century.
Working closely with maverick director Erich Von Stroheim, she later provided titles for Foolish Wives (1922), The Merry Widow (1925), which starred Mae Murray, and Queen Kelly (1929). The latter fell victim to the sound revolution and was summarily scrapped by its producer/star Gloria Swanson.
Ainslee continued to work with MGM for at least another decade, functioning as a script consultant on such major releases as The Good Earth (1937) and Carefree (1938).
After the 1930's, there is little or no record regarding the very talented, Marian Ainslee.