Mamma Mia! Sequel to the smash-hit movie musical to be filmed in Croatia. Abba fans will be excited to hear that a sequel to the smash-hit movie musical Mamma Mia! is planned for release in July 2018. Instead of the Greek island of Skopelos, where the first movie was filmed, the filming location for the follow-up will be the Croatian island of Vis. Mamma Mia! Sequel will be filmed on the Croation island of Vis. Image by: Klemen Štular