Pollyanna is a best-selling 1913 novel by Eleanor H. Porter that is now considered a classic of children's literature, with the title character's name becoming a popular term for someone with the same very optimistic outlook.

Pollyanna Whittier, a young orphan who goes to live in Beldingsville, Vermont, with her wealthy but stern and cold spinster Aunt Polly, who does not want to take in Pollyanna, but feels it is her duty to her late sister. Pollyanna's philosophy of life centers on what she calls "The Glad Game," an optimistic and positive attitude she learned from her father. The game consists of finding something to be glad about in every situation, no matter how bleak it may be.