Question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: What is the name of Sophie's fiance? Title: Mamma Mia! Movie plot: 20-year-old Sophie Sheridan (Amanda Seyfried) lives with her mother Donna (Meryl Streep) on the small Greek island Kalokairi where Donna runs a hotel called Villa Donna. Sophie is planning to marry her fiance Sky (Dominic Cooper)and wants her father to be present to "give her away," but does not know who he is. After reading Donna's diary from 20 years ago, she concludes he is one of three men: Sam Carmichael (Pierce Brosnan), Harry Bright (Colin Firth), or Bill Anderson (Stellan Skarsgard). Without telling her mother and fiance, Sophie mails invitations to all three ("I Have a Dream"), and hopes to find out which is her father. Sophie tells her two best friends, Ali (Ashley Lilley) and Lisa (Rachel McDowall) about her potential fathers ("Honey, Honey"). All three men come to the island, thinking Donna asked them to come, and Sophie hides them upstairs in the old goat house,getting them to agree not to reveal she wrote to them pretending to be her mother Donna. Other guests have also arrived from the harbor:Donna's longtime friends, single,fun-loving writer Rosie (Julie Walters) and rich three-time divorcee Tanya (Christine Baranski).While Donna is making repairs to the hotel she cannot afford (Money, Money, Money), there is a tremor and the dolphin mosaic in the courtyard floor splits. Donna hunts flooring supplies in the goat house, hears noises upstairs, and peers inside the trap door and window. Recognizing the men she had dated,Donna panics,but tries to take another peek at them(Mamma Mia), but cannot get inside the locked room. Finally, she climbs to the rooftop, and then falls through the top door(opened by a member of the Greek chorus whom Donna and the other characters apparently cannot see). Donna, unable to handle the memories, asks the three men to leave the island, so they simply stay in the harbor on Bill's boat. Seeing the three men has sent Donna into shock, her two friends, Tanya and Rosie, try to reassure her (Chiquitita). Donna explains the 3 potential fathers are on the island, and...
Answer:
Sky