Ol Parker Director Amanda Seyfried Sophie Actor Lily James Young Donna Actor Pierce Brosnan Sam Carmichael Actor Colin Firth Harry Bright Actor Stellan Skarsgård Bill, Kurt Actor Meryl Streep Donna Sheridan Actor Cher Ruby Sheridan Actor Andy Garcia Fernando Cienfuegos Actor Alexa Davies Young Rosie Actor Jessica Keenan Wynn Young Tanya Actor Josh Dylan Young Bill Actor Jeremy Irvine Young Sam Actor Hugh Skinner Young Harry Actor Dominic Cooper Sky Actor Julie Walters Rosie Actor Christine Baranski Tanya Actor Judy Craymer Producer Gary Goetzman Producer Benny Andersson Executive Producer Björn Ulvaeus Executive Producer Rita Wilson Executive Producer Tom Hanks Executive Producer Richard Curtis Executive Producer Phyllida Lloyd Executive Producer Nicky Kentish Barnes Executive Producer Robert Yeoman Cinematographer Peter Lambert Film Editing Anne Dudley Original Music Alan MacDonald Production Design John Frankish Production Design Andrew Palmer Art Director Louise Marzaroli Art Director James Lewis Art Director Dominic Capon Set Decoration Michele Clapton Costume Design Nina Gold Casting