The Ballad of Wallis Island is a 2025 British comedy-drama film directed by James Griffiths, produced by Rupert Majendie, and written by Tim Key and Tom Basden. It is based on their 2007 short film The One and Only Herb McGwyer Plays Wallis Island. Basden and Carey Mulligan star as a folk duo who reunite to perform for a wealthy fan (Tim Key) on a remote Welsh island.The Ballad of Wallis Island premiered at the Sundance Film Festival on January 25, 2025, followed by a limited theatrical release by Focus Features in the United States on March 28, and in the United Kingdom on May 30, 2025.