Fred Mertz is a fictional character from the classic American television sitcom, I Love Lucy. He is portrayed by actor William Frawley and is the husband of Ethel Mertz, who is Lucy Ricardo's best friend. Fred is known for his grumpy demeanor and humorous interactions with Lucy and Ethel, often serving as a voice of reason amidst their antics. Fred Mertz is a retired bricklayer and lives in New York City with Ethel. His character often provides comic relief, balancing the more whimsical nature of Lucy's schemes. The show, which aired from 1951 to 1957, remains a significant part of American television history.