Ethel Mertz is a fictional character from the classic television sitcom I Love Lucy, which aired from 1951 to 1957. She is portrayed by actress Vivian Vance and is best known as the best friend and neighbor of the show's main character, Lucy Ricardo. Ethel is characterized by her supportive nature and comedic interactions with Lucy and her husband, Ricky Ricardo. Ethel is married to Fred Mertz, played by William Frawley, and together they often find themselves involved in Lucy's various schemes and antics. The character of Ethel is beloved for her humor, loyalty, and the dynamic friendship she shares with Lucy, making her an essential part of the show's enduring legacy.