On a Greek Island called Kalokairi, 20-year-old Bride-to-be Sophie Sheridan posts three wedding invitations to her possible fathers, Sam, Bill & Harry. Sophie's bridesmaids,Ali and Lisa,arrive at Kalokairi,and Sophie tells them that she has read her mom's diary and that she has three possible fathers.Mother, Donna Sheridan,gets a visit from her two best friends Rosie & Tanya. The three men arrive on the island, only to find out that Donna has no clue that 3 men are attending Sophie's wedding.