Phantom Thread is a 2017 American romantic period drama film written and directed by Paul Thomas Anderson, and starring Daniel Day-Lewis, Vicky Krieps and Lesley Manville. Set in 1950s London, it stars Day-Lewis as an haute couture dressmaker who takes a young waitress, played by Krieps, as his muse. As of 2024 it marked Day-Lewis's final film role. The film is the first Anderson film shot outside the United States, with principal photography beginning in January 2017 in Lythe in North Yorkshire, England. It is Anderson's second collaboration with Day-Lewis, following There Will Be Blood (2007), and his fourth with composer Jonny Greenwood.

Paul Thomas Anderson, also known by his initials PTA, is an American filmmaker. His accolades include nominations for eleven Academy Awards, three Golden Globe Awards, and eight BAFTA Awards. He has also won Best Director at the Cannes Film Festival, the Silver Lion at the Venice Film Festival, and both the Silver and Golden Bear at the Berlin Film Festival.