<Ul> <Li> Björn Ulvaeus as a university professor . </Li> <Li> Benny Andersson as the pianist in the Parisian restaurant during `` Waterloo '' . </Li> <Li> Jonathan Goldsmith as Rafael Cienfuegos , Fernando Cienfuegos 's widower brother . </Li> </Ul>
who had cameo roles in mamma mia here we go again
Björn Ulvaeus Benny Andersson Jonathan Goldsmith