<Li> Stellan Skarsgård as Bill Andersson, Sophie's possible father, a Swedish sailor and travel writer . </Li> <Li> Dominic Cooper as Sky, Sophie's fiancé who is designing a website for the hotel . </Li> <Li> Julie Walters as Rosie Mulligan, one of Donna's former bandmates in Donna and the Dynamos; an unmarried fun - loving author . </Li> <Li> Christine Baranski as Tanya Chesham - Leigh, Donna's other former bandmate; a rich three - time divorcee . </Li>

Who are the actresses in the movie mamma mia