LOS ANGELES -- Actress Doris Singleton, who played one of Lucy and Ricky Ricardo's lesser-known neighbors on "I Love Lucy," has died. She was 92.
Her character, first called Lillian Appleby and then Caroline Appleby, appeared in 10 episodes. She was Lucy's neighbor, the wife of a radio station owner. "She was sort of Lucy's nemesis" because both had young sons, though Lucy had to be nice to the radio station owner's wife, Singleton said in a 2005 interview for the Archive of American Television of the Academy of Television Arts & Sciences Foundation.
Born in Brooklyn, Singleton was a professional ballet dancer in her teens and later became a singer and radio actress.
Singleton also played Margaret Williams on the 1960s sitcom "My Three Sons" and appeared on dozens of other TV shows in the 1950s, '60s and '70s, including another Lucille Ball program, "Here's Lucy," "The Dick Van Dyke Show," "Perry Mason," and "All in the Family."
Don Grady, who played Robbie Douglas on "My Three Sons," died Wednesday of cancer at age 68.
Singleton was married to comedy writer Charlie Isaacs for 61 years before his death in 2002.