Although not possessing the finer vocal talents of her sisters, she did develop a flair for comedy, which she used to good effect in a character she called Aunt Polly. In 1949, she enjoyed a country and pop hit with a duet version of "Baby It's Cold Outside" with comedy duo Homer & Jethro.
In 1952, June married Carl Smith, with whom she performed at Nashville's Grand Ole Opry, and their daughter, Rebecca Carlene (later to record under the name Carlene Carter), was born in 1955. After their divorce in the late '50s, Carter was managed by Colonel Tom Parker and toured with Elvis Presley, and while living in Nashville, she met and briefly married local police officer Rip Nix with whom she another daughter, Rosie.
Following a long absence from the spotlight, she returned with the 1999 album Press On, which won a Grammy for best traditional folk album. The 2003 album Wildwood Flower also won two Grammys. She died on May 15, 2003.
In 2005, a film based on her romance with Cash, Walk the Line, was Oscar-nominated for Best Picture. Reese Witherspoon, who played Carter Cash, won an Oscar for her role. That same year, Columbia Legacy issued a two-disc set, Keep on the Sunny Side: June Carter Cash -- Her Life in Music.