Amanda Seyfried recently shared that she’d love to see rising stars Sabrina Carpenter and Sydney Sweeney join the cast of a potential Mamma Mia 3. While the film hasn’t been officially confirmed, Seyfried’s dream casting suggests a fresh, youthful twist on the beloved musical franchise. Both Carpenter and Sweeney have been dominating pop culture, making them exciting choices to bring new dynamics, vocals, and storylines to the next chapter, if it gets the green light.