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. While elements of the original concept remain in the final product, the finished film focuses on a deteriorating relationship inspired by a difficult breakup experienced by Aster himself. The film's soundtrack, composed by the British electronic musician Bobby Krlic, takes inspiration from Nordic folk music. The film was predominantly shot on location within the Budapest metropolitan area of Hungary, from July to October 2018.

Midsommar was theatrically released in the United States by A24 on July 3, 2019, and in Sweden by Nordisk Film on July 10, 2019. The film grossed $48 million and received positive reviews, with praise for Aster's direction and Pugh's performance in particular, although it polarized general audiences.