<Dt> Cameo appearances and Uncredited roles </Dt> <Ul> <Li> Benny Andersson as "Dancing Queen" piano player </Li> <Li> Björn Ulvaeus as Greek god </Li> <Li> Rita Wilson as Greek goddess </Li> </Ul> <Li> Benny Andersson as "Dancing Queen" piano player </Li> <Li> Björn Ulvaeus as Greek god </Li>

Who is the guy playing the piano in mamma mia