Donna Sheridan – The manager at a Greek island resort, Sophie’s fun-loving, caring and driven mother with a wild past wants the best for Sophie but, her past lovers lead Sophie into a father goose chase days before her wedding.
Sophie Sheridan – Young and determined Sophie wants to know who her father is so she invites three men from her mother’s old diary to come to her wedding, but the men think that Donna invited them. She hopes to figure out which is her father before she walks down the aisle to marry Sky.
Sam Carmichael – One of the three potential fathers, Sam is a American businessman man with a family but, falls back in love with Donna in the midst of the father-finding frenzy.
Bill Austin – Another one of the three potential fathers, adventure-seeking Bill is cautious to learn he might be Sophie’s dad.
Harry Bright – The last of the three potential fathers, Harry leaves his boring life in England to go back to the island curious to see Donna again after her invitation to the wedding.
Rosie – One of Donna’s oldest girl friends, Rosie is another adventure-seeker invited to the wedding helping Donna figure out why her past lovers have returned to the island.
Tanya – Another of Donna’s girl friends invited to the island for the wedding that supports Donna when she learns of her old lovers perusing the island.
Sky – Sophie’s fiancée who deeply loves Sophie but, is upset that she is cannot find happiness in the fact she is about to be married and only wants to know who her father is.