About Doris Singleton
Dorthea "Doris" Singleton (September 28, 1919 – June 26, 2012) was an American actress, perhaps best remembered as Lucy Ricardo's frenemy, Carolyn Appleby, in I Love Lucy. == Early life and career == Singleton, born in New York City, trained as a ballerina, dancing for three seasons in the mid-1930s with the newly formed "Ballet Theatre", later to become the American Ballet Theatre. She began her career in show business as a vocalist in the late 1930s with Art Jarrett's orchestra. Singleton worked in New York during World War II both as a guest star and in regular roles on numerous hit radio shows, including The Whistler and The Alan Young Show, on which she played Young's girlfriend, Betty Dittenfeffer. She played Ruth Henshaw on the radio version of December Bride. During a guest appearance on the radio show My Favorite Husband in 1948 she met Lucille Ball and began their long professional relationship. She had a recurring role in I Love Lucy playing Carolyn Appleby in ten episodes between 1953 and 1957. (The character was named "Lillian Appleby" in her first appearance but "Carolyn Appleby" thereafter.) In 1953, she made her television debut as Gloria Harper in the episode "Jungle Devil" on the series, The Adventures of Superman. Coincidentally, Singleton's final appearance on I Love Lucy was in an episode with Superman George Reeves ("Lucy and Superman" episode #166). Singleton played Lois in the syndicated television version of The Great Gildersleeve in 1954–1957.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.