MAMMA MIA! 3: THE LAST SUMMER (2026)

Starring: Amanda Seyfried • Meryl Streep • Lily James

The music returns for one final summer in Mamma Mia! 3: The Last Summer. Set against the sun-drenched beauty of Kalokairi, this final chapter in the beloved Mamma Mia! series brings a blend of nostalgia, joy, and heartfelt emotion as Sophie (Amanda Seyfried) uncovers the long-lost diaries of her mother, Donna (Meryl Streep). These hidden pages reveal secrets of Donna’s past, ones that will reshape the way Sophie views love, family, and even her own destiny.

As the golden sun sets over the Aegean Sea, Sophie embarks on a journey of discovery that unlocks the mysteries of her mother’s life—secrets that were buried deep and that have the power to change everything. The diaries tell a story of love, heartache, and choices that were made long before Sophie was born. As the truth unravels, Sophie learns more about Donna’s strength, sacrifices, and the hidden joys of her own motherhood.

Old faces return to Kalokairi as the island holds its final celebration, with Sky (Dominic Cooper) by Sophie’s side, and Bill (Stellan Skarsgård), Sam (Pierce Brosnan), and Harry (Colin Firth) adding their own layers to the tapestry of love, family, and legacy. A new generation rises, carrying the torch passed down from their parents, as they too discover the weight of their roots and the power of love that transcends time.

With ABBA classics reimagined and reinterpreted, the music continues to be the heart of this joyous story. The tunes that defined generations—Dancing Queen, Super Trouper, Take a Chance on Me—are given new life, filled with the same exuberance, while capturing the deeper emotional truths of family and finding your place in the world.

In a summer of reunions, revelations, and rediscovered love, Sophie and her family will come to understand that some things are never truly lost. Secrets of motherhood, fatherhood, and the paths we choose will come to light, and they will shape the legacy of Kalokairi and its people.

Mamma Mia! 3: The Last Summer is a joyful, emotional, and timeless celebration of love, life, and music. As the final sun sets over the island, one thing becomes clear:

When the sun sets—the music lives on.