Phantom Thread is a 2017 American-British period romantic drama film written and directed by Paul Thomas Anderson, set in the haute couture world of London in the 1950s. It stars Daniel Day-Lewis as a couturier who takes a young waitress, played by Vicky Krieps, as his muse; it is Day-Lewis's final role before his retirement. The film is the first Anderson film shot outside the United States, with principal photography beginning in January 2017 in Lythe, England. It is Anderson's second collaboration with Day-Lewis, following There Will Be Blood (2007), and his fourth with composer Jonny Greenwood.
Phantom Thread premiered in New York City on December 11, 2017, and was theatrically released in the United States on December 25, 2017. The film received praise for its acting, screenplay, direction, musical score, costume design, and production values. It was chosen by the National Board of Review as one of the top ten films of 2017.