'Mamma Mia' follows the story of 18-year-old Sophie Sheridan (Amanda Seyfried) who has a problem on the eve of her wedding: she doesn't know who her father is.He could be any of her mother Donna's (Streep) past suitors: Sam Carmichael (Brosnan), Bill Austin (Skarsgård) or Harry Bright (Firth).
The only way for her to find out is to invite all three to her wedding to see what happens.The film and stage musical use a host of Abba songs to tell the story, including 'Dancing Queen', 'SOS' and 'Take a Chance on Me'.