Mamma Mia! is a feel-good musical comedy about a young woman who discovers she has three potential fathers and invites them all to her wedding:

 On the Greek island of Kalokairi, 20-year-old Sophie Sheridan is about to marry Sky. However, she doesn't know who her father is. After finding her mother's diary, Sophie discovers that Donna dated three men in her past: Sam Carmichael, Harry Bright, and Bill Anderson. Sophie invites all three men to the wedding without telling her mother, hoping that one of them will be her father.