Several years after the reopening of Donna’s Hotel Bella Donna, the sun-soaked Greek island is thriving once again — filled with music, laughter, and stories that refuse to stay in the past. Sophie has grown into a confident mother and businesswoman, running the hotel with warmth and chaos that perfectly mirrors Donna’s legacy.
But when Sophie discovers a collection of her mother’s unrecorded journals and cassette tapes, the past comes alive in unexpected ways. The entries reveal a missing chapter of Donna’s youth — a journey she never spoke about, involving a life-changing choice, a forgotten love, and a song she never finished.
As preparations begin for a grand island celebration marking the hotel’s anniversary, Sam, Bill, and Harry return, each carrying their own reflections on aging, fatherhood, and the strange ways love lingers. Meanwhile, Sophie begins to question whether she truly knows her own story — or if she has been living inside the echoes of her mother’s.
The mystery deepens when a stranger arrives on the island, connected to Donna’s hidden past and holding answers Sophie never expected. Through laughter, tears, and a whirlwind of classic ABBA hits alongside newly imagined performances, the island once again becomes a stage for love in all its forms.
MAMMA MIA! 3 is a joyful, emotional farewell — celebrating mothers and daughters, chosen families, and the beautiful truth that love doesn’t end… it just finds new voices to sing it.