A Quiet Place: Day One is a 2024 American apocalyptic horror film that is the third installment in the A Quiet Place film series, serving as a spin-off and prequel to A Quiet Place (2018). It was written and directed by Michael Sarnoski, based on a story he conceived with John Krasinski. The film stars Lupita Nyong'o as a terminally ill woman during the early stages of an invasion in New York City by blind, extraterrestrial creatures with an acute sense of hearing (known unofficially as "Death Angels"). The supporting cast includes Joseph Quinn and Djimon Hounsou, who reprises his role from A Quiet Place Part II.

Development on A Quiet Place: Day One began in November 2020, with Jeff Nichols set to write and direct. Despite a completed script, Nichols dropped out of the film in October 2021. In January 2022, Sarnoski was announced to replace Nichols as writer and director; he was approached by Krasinski because of his feature directorial debut Pig (2021). Principal photography took place from February 2023 to April 2023 in London, England.

A Quiet Place: Day One premiered at the Tribeca Festival on June 26, 2024, and was released in the United States by Paramount Pictures on June 28, 2024. The film received positive reviews from critics and grossed over $261 million worldwide.