BRANSON, Mo. -- Isabelle ''Sis" Lennon Miller, mother of the Lennon Sisters who starred on Lawrence Welk's popular TV show in the 1950s, died May 1. She was 85.
Her death from congestive heart failure in Branson was announced Tuesday by Sandi Padnos, a Los Angeles-based publicist for the family.
The Lennon Sisters -- Dee Dee, Peggy, Kathy, and Janet -- made their national debut with Welk on his Christmas program in 1955. The girls, then 16, 14, 12, and 9, soon became one of the most popular acts on Welk's show, which was one of the most widely seen TV programs of its era.
The Lennon Sister split from Lawrence Welk in the late 1960s, and the four eventually had their own television show with Jimmy Durante.
Mrs. Miller was the mother of 12, including one daughter who died previously.
Three of her sons and a daughter-in-law are also entertainers singing in Branson, and a son-in-law and grandsons perform as a rock band.