Donna and the Dynamos is a fictional girl group featured in the musical and film Mamma Mia!. The group consists of three friends—Donna Sheridan, Tanya, and Rosie—who perform popular songs by the Swedish band ABBA. In the story, Donna is a single mother preparing for her daughter Sophie’s wedding. The reunion of the Dynamos brings back memories and highlights themes of friendship, love, and the passage of time. Their performances are energetic and nostalgic, showcasing the enduring appeal of ABBA's music.