No connection to the book of the same name by Stephenie Meyer. The Host (Gwoemul, as it's known in its home country) is a critically-acclaimed 2006 film by Bong Joon-ho, combining aspects of the Kaiju movie, the political satire, and the family dramedy. It absolutely swept the Blue Dragon Awards and the 1st Asian Film Awards. It's also one of Quentin Tarantino's favourite movies of recent times.