Davies is best remembered for her relationship with newspaper tycoon
William Randolph Hearst. Even during her career, her high-profile social life often obscured her professional career. In her posthumously published memoirs, Davies claimed she wasn't an actress, knew nothing about politics, and described herself as a "silly, giggly idiot."
After making her screen debut in late 1916 in a fashion newsreel, modeling gowns by Lucile (
Lucy, Lady Duff-Gordon), she appeared in her first feature film in 1917's
Runaway Romany. It was a film written by herself and directed by her brother-in-law, the prominent Broadway producer George W. Lederer. The following year she starred in three films,
The Burden of Proof,
Beatrice Fairfax, and
Cecilia of the Pink Roses. Playing mainly light comedic roles, she quickly became a major movie personality, making a small fortune which enabled her to provide financial assistance for her family and friends.
Cecilia of the Pink Roses in 1918 was her first film backed by Hearst. She was on her way to being the most famously advertised actress in the world. During the next 10 years she appeared in 29 films, an average of almost three films a year.
By the mid-1920s, however, her career was often overshadowed by her relationship with the married Hearst and their fabulous social life at
San Simeon and Ocean House in
Santa Monica dubbed the biggest house on the beach, "the beach between
San Diego and
Vancouver".
Hearst had met her soon after she'd started working in movies, and formed Cosmopolitan Pictures solely to produce starring vehicles for her. Hearst's relentless efforts to promote her career instead had a detrimental effect, but he persisted, making Cosmopolitan's distribution deals first with
Paramount, then
Goldwyn, and then
Metro Goldwyn Mayer. Davies, in her published memoirs
The Times We Had, concluded that Hearst's over-the-top promotion of her career, in fact, had a negative result.
Hearst loved seeing her in expensive costume pictures, but she also appeared in contemporary comedies like
Tillie the Toiler,
The Fair Co-Ed (both 1927), and especially two directed by
King Vidor,
The Patsy and the backstage-in-Hollywood saga
Show People (both 1928).
The Patsy contains her imitations, that she usually did for friends, of silent stars
Lillian Gish,
Mae Murray and
Pola Negri.
The coming of sound made Davies nervous, because she had never completely overcome a childhood
stutter. Her career survived, however, and she made several comedies and musicals during the 1930s, including
Marianne (1929),
Not So Dumb (1930),
The Florodora Girl (1930),
The Bachelor Father (1931),
Five and Ten (1931) with
Leslie Howard,
Polly of the Circus (1932) with
Clark Gable,
Blondie of the Follies (1932),
Peg o' My Heart (1933),
Going Hollywood (1933) with
Bing Crosby, and
Operator 13 (1934) with
Gary Cooper. She was involved with many aspects of her films and was considered an astute businesswoman. Her career, however, was hampered by Hearst's insistence that she play distinguished, dramatic parts, as opposed to the comic roles that were her forte. She also harboured an increasing dependence on alcohol, hiding bottles of liquor in San Simeon's toilet tanks. However, her body of work has often been praised by contemporary critics.
Hearst reportedly had tried to push MGM executives to hire Davies for the role of
Marie Antoinette in
Marie Antoinette (1938).
Louis B. Mayer hired producer
Irving Thalberg's wife
Norma Shearer for the part instead. Hearst reacted by pulling his newspaper support for MGM, and moved Cosmopolitan Pictures to
Warner Bros.'s studios, but stayed only a few years. Davies' films there included
Page Miss Glory (1935),
Hearts Divided,
Cain and Mabel (both 1936), and
Ever Since Eve (1937), her last film. Cosmopolitan Pictures folded, so she left the screen and retreated to San Simeon.