Reprising their roles from Mamma Mia! The Movie are Academy Award® winner Meryl Streep as Donna, Julie Walters as Rosie and Christine Baranski as Tanya. Amanda Seyfried and Dominic Cooper reunite as Sophie and Sky, while Pierce Brosnan, Stellan Skarsgård and Oscar® winner Colin Firth return to play Sophie’s three possible dads: Sam, Bill and Harry. As the film goes back and forth in time to show how relationships forged in the past resonate in the present, James will play the role of Young Donna. Filling the roles of Young Rosie and Young Tanya are Alexa Davies (A Brilliant Young Mind) and Jessica Keenan Wynn (Broadway’s Beautiful). Young Sam will be played by Jeremy Irvine (War Horse), while Young Bill is Josh Dylan (Allied) and Young Harry is Hugh Skinner (Kill Your Friends).