Amanda Seyfried has officially opened the door to the most chaotic, delightful casting dream of 2026. While talking about the future of Mamma Mia 3, she casually suggested that Sabrina Carpenter and Sydney Sweeney could join the franchise. And when Amanda Seyfried says something like that, fans don’t take it lightly. Twitter, TikTok, and every corner of the musical-romcom universe immediately lit up.
Amanda joked that maybe Sophie (her character) has a cousin she hasn’t seen in a while, and that cousin could easily be Sabrina. And Sydney Sweeney? Amanda thinks she could also slide right into the Mamma Mia universe. According to Amanda, there are so many girls who want to be a part of the next film and she is completely on board. One thing about the Mamma Mia cast is that they genuinely love the chaos, the heart, and the sunshine of this franchise. And the idea of blending old-school ABBA magic with Gen Z’s biggest It-girls is the kind of cinematic crossover the internet thrives on.
Let’s be real. Sabrina Carpenter in a glossy, Greek-island musical where the drama is high, the singing is loud, and everyone is constantly running around in linen? It fits. She already has the vocals, the humor, and the chaotic-good energy that Mamma Mia thrives on. Plus she’s already proven she can act, she can steal a scene, and she understands camp without even trying. Imagining her belting an ABBA classic or flirting with the wrong guy at the wrong time? Too easy.
Sydney Sweeney brings a different kind of spark. She can be intense, emotional, comedic, or just wildly charming depending on the moment. Mamma Mia is all about heart and confusion and messy family dynamics, and Sydney plays messy like it is an art form. Amanda Seyfried saying she wants Sydney around is basically Hollywood code for: yes, this could actually happen.
Fans also know that Mamma Mia 3 has been teased for years. The cast is ready, ABBA’s catalogue is deep enough to carry another film, and the audience is more obsessed with musical nostalgia than ever. A third movie will happen the moment the studio decides the timing and cast lineup are strong enough. And bringing in names like Sabrina and Sydney guarantees an entirely new generation would show up on opening weekend.
Also Read: Sydney Sweeney and Amanda Seyfried Lead Lionsgate’s Upcoming Thriller The Housemaid
What makes Amanda’s comment even more fun is that it feels natural. Mamma Mia has always been a franchise built on good vibes, sunshine, family, and a little bit of chaos. Adding two of Hollywood’s most talked-about young stars gives it a fresh jolt without losing the heart that made the originals iconic.
So if Mamma Mia 3 really brings Sabrina Carpenter and Sydney Sweeney into the ABBA universe, we are not complaining.
