Ethel Mertz
Ethel Mae Mertz (née Potter) (alternately Ethel Louise, Ethel May, and Ethel Roberta), played by Vivian Vance, is one of the four main fictional characters in the highly popular 1950s American television sitcom I Love Lucy. Ethel is the middle-aged landlady of the main character, Lucy Ricardo, played by Lucille Ball. Ethel is married to Fred Mertz, played by William Frawley, with whom she had a career in vaudeville. The two female characters are close friends, habitually scheming together; Ethel is generally the voice of reason as a counterpart to Lucy's harebrained ideas.