'' (1930) '' (1933) and
Ann Harding in
The Animal Kingdom (1932) Stengler transitioned into work as a film actress in California; beginning with the part of Lady Robert in
Warner Bros.'s German-language feature
The Royal Box (1929) which was adapted from the play
Kean by
Alexandre Dumas. For Warner Bros. she also appeared in the
Vitaphone Varieties short film
The Master Sweeper (1930). Later that year she signed a three year contract with
RKO Radio Pictures. She married film director
Boris Ingster in Los Angeles on Christmas Eve 1930; obtaining a marriage license three days later on 27 December 1930. Following her wedding she became a naturalized American citizen. Stengler's first role in a full-length English-language film was Olga in RKO's
Half Shot at Sunrise; a film starring the comedy duo
Wheeler & Woolsey. She appeared in another Wheeler & Woolsey film for RKO,
Cracked Nuts (1931), in which she played the part of Queen Carlotta. In these works, as well as in radio performances with Wheeler & Woolsey, she acted as the
straight man and romantic interest with
Robert Woolsey, as
Dorothy Lee did with
Bert Wheeler. In
Half Shot at Sunrise, Stengler and Woolsey share a comic dance routine, during which she tears off most of Woolsey's
doughboy uniform, until he ends up in his
skivvies, posing in a fountain. Other RKO Pictures she had roles in included
Beau Ideal (1931, as Zuleika), and
The Animal Kingdom (1932, as the cellist Franc Schmidt). While working for RKO she also appeared in films for
Paramount Pictures; including
The Road to Reno (1931, as Mrs. Stafford Howes),
The Beloved Bachelor (1931, as Julie Stressman), ''
Husband's Holiday (1930, as Molly Saunders), Luxury Liner (1933, a slattern) and Kickin' the Crown Around (1933, The Queen). She worked with Buster Keaton in Casanova wider Willen
("The Reluctant Casanova", 1931), the German version of Parlor, Bedroom and Bath'' (1931). In 1933 Stengler left RKO. For the
Fox Film Corporation she portrayed Countess Vonesse in
Man About Town (1932), and
Columbia Pictures she appeared as Mrs. Landau in
Hollywood Speaks (1932). For
Metro-Goldwyn-Mayer she appeared in an unnamed part in
Just a Gigolo (1931) and as the German tourist Ilsa in
The Barbarian (1933). In 1934 she performed opposite
Shemp Howard in two short film made by Warner Bros.:
Henry the Ache and
Art Trouble. ==Later life and career==