Lenny Kosnowski is a fictional character from the television show Laverne & Shirley. He is portrayed as a lovable and goofy friend of the main characters, Laverne DeFazio and Shirley Feeney. Lenny is known for his quirky personality and humorous antics, often providing comic relief in various situations. Lenny is typically seen alongside his best friend, Squiggy, who shares his playful and silly demeanor. Together, they navigate the ups and downs of life in Milwaukee during the 1950s and 1960s, contributing to the show's lighthearted and entertaining atmosphere.