Step 1 : Introduction to the question "Of the four main actors, who was the last living cast member of "I Love Lucy"?"
On this day in 1951, the sitcom “I Love Lucy” premiered on television. The show was centered around Lucy Ricardo (Lucille Ball) and her singer/bandleader husband Ricky Ricardo (Desi Arnaz), along with their best friends and landlords Fred Mertz (William Frawley) and Ethel Mertz (Vivian Vance). Of the four main actors, Lucille Ball was the last living cast member of I Love Lucy. She died on April 26, 1989. Desi Arnaz died on December 2, 1986. Vivian Vance died on August 17, 1979. And William Frawley died on March 3, 1966.