According to the bio on Wikipedia: "Ilona Massey (born Ilona Hajmássy) was a Hungarian film, stage and radio performer.
She was born in Budapest, Austro-Hungarian Empire (now Hungary). Billed as "the new Dietrich", she acted in three films with Nelson Eddy, including Rosalie (1937), and with Lon Chaney Jr. in Frankenstein Meets the Wolf Man (1943) as Baroness Frankenstein. In 1943, she appeared in the Ziegfeld Follies.
In 1947, she starred with Eddy in Northwest Outpost, a musical film composed by Rudolf Friml. In 1949, she starred in Love Happy with the Marx Brothers. She played Madame Egelichi, a femme fatale spy, and her performance inspired Milton Caniff in the creation of his femme fatale spy, Madame Lynx, in the comic strip "Steve Canyon". Caniff hired Massey to pose for him.
In 1950, Massey was one of the stars of the NBC spy show Top Secret on radio. In 1952 she began starring in Rendezvous on ABC television. The program was described in a magazine article as "a mystery-drama with plenty of glamour thrown in.""