She was one of the few close friends of Greta Garbo. Five of her eight screenwriting credits were for Garbo movies, and she also acted with her in another film.
Writer, in the U.S. from 1928. Worked for MGM under contract, 1933-37.
She was blacklisted in America as a suspected Communist during the 1950's. For a time, her passport was confiscated, which prevented her from going to Europe to see her ex-husband Berthold Viertel when he was dying.