From the 1965–66 season onward, with the change in format, a number of celebrities guest starred on "The Lucy Show", usually playing themselves under the premise that the Lucy Carmichael character, now living in Hollywood, crossed paths with them, either in her day-to-day life, or through her job at the bank. These included Jack Benny, Mickey Rooney, Carol Burnett, George Burns, Joan Crawford, Tennessee Ernie Ford, Dean Martin, Frankie Avalon, Wayne Newton, Robert Stack, Mel Tormé, John Vivyan, Jack Cassidy, Clint Walker, and Milton Berle.