Shirley Feeney is a fictional character from the popular television sitcom Happy Days, which aired from 1974 to 1984. She is portrayed by actress Cindy Williams and is known for her cheerful personality and close relationship with her sister, Laverne DeFazio. The character is a waitress at the local diner and often finds herself in humorous situations. Shirley is characterized by her iconic 1950s style, including her signature poodle skirts and bouncy hairstyles. The show highlights her adventures and friendships in the vibrant setting of Milwaukee, Wisconsin, capturing the essence of American life during that era.