When did Lucy, Ricky, Ethel, and Fred of “I Love Lucy” (CBS, 1951-57) die?

Lucille Ball (Lucy) died on April 26, 1989, at age 77.

Desi Arnaz (Ricky) died December 2, 1986, at age 69.

Vivian Vance (Ethel) died on August 17, 1979, at age 72.

William Frawley (Fred) died on March 3, 1966, at age 79.