Mamma Mia! left a lasting impression in 2008 as the cast transported viewers to Greece while singing ABBA's greatest hits - and one film just wasn't enough. Meryl Streep and Amanda Seyfried captivated audiences as mother-daughter duo Donna and Sophie in the original movie. In hopes of getting answers about her father's identity, Sophie contacts three of her mom's former flames - Sam (Pierce Brosnan), Bill (Stellan Skarsgård) and Harry (Colin Firth) - before her wedding. While fans never officially learn who Sophie's dad is, the men all agree to stay in her life as father figures.