The younger sister (20 years younger) of actor James Cagney, Jeanne Cagney inaugurated her own acting and modelling career in the late 1930s, making her stage bow at the Pasadena Playhouse. While all the Cagneys looked out for one another both personally and professionally, Jeanne was able to succeed on her own merits. Still, some of her most memorable film work was concentrated in brother Jimmy's films, notably Yankee Doodle Dandy (1942) and The Time of Your Life (1948). Perhaps her best film role was the trashy femme fatale who leads Mickey Rooney down the path to perdition in Quicksand (1950). Jeanne Cagney's television work included a lengthy stint as fashion commentator on the daytime audience-participation series Queen for a Day.