Midsommar is a 2019 folk horror film written and directed by Ari Aster. It stars Florence Pugh and Jack Reynor as an American couple who are drawn into a violent cult in rural Sweden. Supporting actors include William Jackson Harper, Vilhelm Blomgren, Ellora Torchia, Archie Madekwe, and Will Poulter. A co-production between the United States and Sweden, Midsommar was initially pitched to Aster as a straightforward slasher film set among Swedish cultists.
https://en.wikipedia.org/wiki/Midsommar