Meryl Streep did not refuse to do "Mamma Mia! Here We Go Again" but had a limited role due to her character, Donna, being deceased in the film's timeline. The story focuses on her daughter, Sophie, and features flashbacks to a younger Donna, played by Lily James. Streep does appear in a brief scene in the form of a flashback and in a final musical number, reflecting her ongoing connection to the beloved character despite the narrative shift.

In "Mamma Mia!", Sophie Sheridan is the daughter of Donna Sheridan. The identity of her father is a central plot point, as Sophie discovers that any of three men could be her dad: Sam Carmichael, Bill Anderson, or Harry Bright. Throughout the film, Sophie invites all three to her wedding in hopes of finding out who her real father is. Ultimately, the movie leaves it somewhat ambiguous, but it leans towards Sam being her true father, especially after their emotional reunion at the end.

As of October 2023, there has been no official confirmation regarding the filming of "Mamma Mia! 3." While there have been discussions among cast members and producers about a potential sequel, no concrete plans or production timelines have been announced. Fans of the franchise continue to hope for a third installment, but for now, any updates remain speculative. Keep an eye on official announcements for the latest news.

ABBA members have expressed positive feelings about the "Mamma Mia!" movie. They appreciated how the film brought their music to a new audience and showcased their songs in a joyful, vibrant way. Benny Andersson and Björn Ulvaeus, the band's songwriters, were involved in the project and supported its production. They viewed the film as a celebration of their music, and its success helped renew interest in ABBA's catalog. Overall, the band embraced the film's spirit and its impact on their legacy.