More details about the "Mamma Mia!" sequel are being unveiled.

News came in May that "Mamma Mia: Here We Go Again" was officially on, but it wasn't clear specifically which of the original cast members were slated to return for more ABBA-fueled fun. Now, we know that Amanda Seyfried is onboard, thanks to a Deadline report. She'll reprise her role as Sophie, the young woman who invited her mother's three former lovers to her wedding to find out which was her biological father.

The last we saw Sophie in the 2008 musical, she and her mom, Donna (Meryl Streep), had made up after a fight, and Sophie was happily enjoying having three dads. She also postponed her wedding to her fiancé, Sky (Dominic Cooper), in favor of traveling the world together. We'll see if they're still a couple in the sequel -- Seyfried and Cooper are real-life exes now.

It'll be interesting to learn where the characters' lives have gone in the almost 10 years since we last saw them. We can't wait for more adventures and a soundtrack of catchy ABBA tunes.

"Mamma Mia: Here We Go Again" is slated for a July 20, 2018 release.

[via: Deadline]