Kay Francis as Tanya Borodoff aka Spot White / Marjorie Lang

Ricardo Cortez as Tony Evans

Warner Oland as Nick

Lyle Talbot as Dr. Gregory Burton

Ruth Donnelly as Mrs. George Peters

Lucien Littlefield as George Peters

Reginald Owen as Police Commissioner Col. Thomas Dawson

Etienne Girardot as Mr. Abernathie

David Torrence as Capt. McAndrews

Rafaela Ottiano as Madame Lacalles

Halliwell Hobbes as Col. Dawson Ames

Bodil Rosing as Mrs. Kleinschmidt

Herman Bing as Prof. Kleinschmidt

Hobart Cavanaugh as Purser (uncredited)