The Incomparable Hildegarde (1906–2005) began her career as a pianist in Milwaukee’s silent movie theaters, which led to the Vaudeville stage. By the 1930s, she was singing in the cabarets of Paris and London, rubbing elbows with royalty, White Russians and Josephine Baker. She then became a darling of the New York supper club scene and her name became synonymous with high-class entertainment at venues like the Plaza Hotel’s Persian Room. She started fashion trends, had her own signature Revlon nail and lip color, and was the first to have song hits in the World War II era. This first biography of Hildegarde Sill covers her 70-year career, including her intimate relationship with her manager, Anna Sosenko, and emphasizes her importance in 20th-century American popular culture.