Big Fish is a musical with music and lyrics by Andrew Lippa and book by John August. It is based on Daniel Wallace's 1998 novel, Big Fish: A Novel of Mythic Proportions, and the 2003 film Big Fishwritten by John August and directed by Tim Burton.

Big Fish revolves around the relationship between Edward Bloom, a travelling salesman, and his adult son Will. The story shifts between two timelines. In the present-day real world, sixty-year-old Edward Bloom faces his mortality while his son, Will, prepares to become a father himself. In the storybook past, Edward ages from a teenager, encountering a Witch, a Giant, a Mermaid, and the love of his life, Sandra. The stories meet as Will discovers a secret his father never revealed