The popular 1950s television show 'I Love Lucy' starred Lucille Ball as Lucy Ricardo, her real-life husband Desi Arnaz as Ricky Ricardo, and Vivian Vance and William Frawley as their best friends Ethel and Fred Mertz. The crossword solutions for the term 'I Love Lucy' are MERTZ (5 letters), DESI (4 letters), and ETHEL (5 letters). These are the surnames of the four main characters in the show.