It's been a long wait since the 2008 film Mamma Mia was released.
In the trailer, Sophie (Amanda Seyfried) calls on her mother's best friends and former band mates, Tanya (Christine Baranski) and Rosie (Julie Walters), to guide her as she embarks on a new life adventure: pregnancy.
It certainly made a lot of fans excited for the sequel, which will take place in the present and the past, flashing back to a young Donna played by Lily James.
What's more, several celebration scenes - with returning stars Colin Firth, Stellan Skarsgard and the actor who plays Donna's husband, Piers Brosnan - don't feature Donna.
For the new film, you can expect ABBA favorites from the original, and there's also word that songs that didn't make it in the first time will make an appearance.
James is joined by Alexa Davies as young Rosie and Jessica Keenan Wynn as young Tanya, as they portray the three close pals at a younger age. The Movie are Academy Award victor Meryl Streep as Donna, Julie Walters as Rosie and Christine Baranski as Tanya.
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Already finding herself in a predicament, Sophie's world is turned upside down after learning her grandma (Cher) makes an unexpected visit to their Greek island of Kalokairi.
These details have led many viewers to wonder if Donna died in between the events of Mamma Mia! and Mamma Mia!: Here We Go Again.
Why are they referring to Donna in the past tense?
"Mamma Mia! Here We Go Again" arrives in theaters July 20. And it's clear just how much we missed her from the tweets that came pouring in after her trailer cameo. New to the cast are Lily James, Jeremy Irvine and Cher.
Streep does not appear in the trailer, except for in flashbacks from the first film, leaving it open to speculation as to what happened to her character.
Streep's character was previously heard moaning: "Somebody up there has got it in for me".