Doris has been active in show business since the 1940s. Her distinctive speaking voice made her a radio favorite. Her association with Lucille Ball began on radio in July of 1948, when she made many appearances with Lucille Ball on radio's My Favorite Husband. Before getting into radio acting, Ms. Singleton was a dancer in New York's Ballet Theatre Company for three seasons, and had her own singing radio show on WNEW, also playing theatres as a singer with Art Jarrett's big band orchestra.
Doris' pretty face and trim figure made her an asset to television. She was a regular on three series' (I Love Lucy, The Great Gildersleeve, and Angel), but Doris is also remembered for cs such as The Jack Benny Show, Perry Mason, The Adventures of Superman, Mr. Lucky, The Dick Van Dyke Show, The Jimmy Durante Show, The Lucy Show, My Three Sons, Hogan's Heroes, Here's Lucy, and many others. She will always be remembered as Lucy Ricardo's friend and nemesis Caroline Appleby on I Love Lucy. She now lives in Los Angeles and occasionally accepts a guest role assignment on TV.