Oskar Karlweis (10 July 1894, Hinterbrühl – 24 January 1956, New York City) was an Austrian stage and film actor, active internationally.
Son of a playwright, Karlweis abandoned his youthful law studies for the stage, first for eight years at Vienna's Stadttheater. After service in World War I, he was active with Max Reinhardt's Theater in der Josefstadt in Vienna, followed by engagements at various theaters in Munich and Vienna, and then to the Berlin stage where he had a popular following playing singing and dancing roles, including as Prinz Orlofsky in Die Fledermaus. His general manner was humorous, charming, naive, and cheerful.
In Berlin between 1930 and 1933 he worked as a recording artist and acted in more than a dozen German light comedy and musical films, most famously as one of Lilian Harvey's suitors in the hugely successful operetta film Die Drei von der Tankstelle.
With Hitler's rise to power in 1933, Karlweis, who was of Jewish descent, returned to the Austrian stage; but with the Nazi Anschluss in 1938 he was again forced to flee, first to Switzerland and then Paris where, at both locations, he took to the stage with fellow Austrian law school dropout, writer/director, and cabaret performer Karl Farkas. When German forces took Paris in 1940, Karlweis, along with his friend Austrian writer Friedrich Torberg, fled via Spain to Portugal, whence they made their way to New York.
Not knowing English, Karlweis was at first limited to acting in German emmigré productions, but he soon got his English legs and appeared in eight Broadway shows in the early 1940s, including the title role in Franz Werfel's long-running "Jacobowsky and the Colonel," garnering outstanding reviews.