The eagerly-awaited sequel to the smash-hit MAMMA MIA! The Movie is released on July 20th. MAMMA MIA! HERE WE GO AGAIN will see Meryl Streep, Amanda Seyfried, Pierce Brosnan, Colin Firth, Christine Baranski, Stellan Skarsgård, Dominic Cooper, and Julie Walters reprising their roles from MAMMA MIA! The Movie, with Lily James and Academy Award® winner Cher joining the cast for an all-new original musical based on the songs of ABBA. Alexa Davies, Josh Dylan, Andy Garcia, Jeremy Irvine, Hugh Skinner and Jessica Keenan Wynn complete the cast. o MAMMA MIA! The Movie, released in 2008, also based on the songs of ABBA, is one of the highest-grossing live-action musicals of all time. Its companion soundtrack sold 1.5 million copies in the UK and achieved global sales of over 7.7 million. Almost a decade since its release, its popularity has not waned. There have been 406 million combined streams of MAMMA MIA! The Movie Soundtrack. ABBA are one of the most successful pop groups of all time. The Swedish quartet have sold over 385 million albums worldwide and their songs have been streamed over 2.8 billion times.