what greek island was mamma mia filmed on

The Greek islands of Skopelos and Skiathos, both part of the Northern Sporades island group, were the primary filming locations for the movie "Mamma Mia!". Skopelos, in particular, served as the fictional island of Kalokairi in the film. Some scenes were also shot on the nearby island of Skiathos and the seaside village of Damouchari in Pelion, on the Greek mainland.