Jo Ann Castle, born Jo Ann Zering on September 3, 1939, in Bakersfield, California, was an American honky-tonk pianist. She began performing at age three and joined The Lawrence Welk Show in 1959, replacing Big Tiny Little, and was hailed by Welk as the “Queen of the Honky-Tonk Piano”. After leaving the show in 1969, Castle performed at the Champagne Theater in Branson, Missouri, and appeared on RFD-TV with Jimmy Sturr and His Orchestra. Her recording career included the 1983 album The Best Little Honky Tonk in Town, which reached number 30 on the Australian charts. Castle died on May 8, 2026, at age 86.