An independent, single mother who owns a small hotel on an idyllic Greek island, Donna (Streep) is about to let go of Sophie (Amanda Seyfried), the spirited daughter she's raised alone. For Sophie's wedding, Donna has invited her two lifelong best girlfriends--practical and no-nonsense Rosie (Julie Walters) and wealthy, multi-divorcee Tanya (Christine Baranski)--from her one-time backing band, Donna and the Dynamos. But Sophie has secretly invited three guests of her own.

On a quest to find the identity of her father to walk her down the aisle, she brings back three men from Donna's past to the Mediterranean paradise they visited 20 years earlier. Over 24 chaotic, magical hours, new love will bloom and old romances will be rekindled on this lush island full of possibilities.

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