A Quiet Place: Day One is a 2024 American apocalyptic horror film written and directed by Michael Sarnoski, based on a story he conceived with John Krasinski. It is the third installment in the A Quiet Place film series, serving as a spin-off prequel to the first film. The film stars Lupita Nyong'o, Joseph Quinn, and Alex Wolff, with Djimon Hounsou reprising his role from A Quiet Place Part II (2020). Its plot follows 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.

Development on A Quiet Place: Day One began in November 2020, with Jeff Nichols set to write and direct. By May 2021, Nichols' script had been completed, but in October 2021, he was dropped from the film due to creative differences. In January 2022, Sarnoski was announced to replace Nichols as writer and director; he was approached by Krasinski because of his indie 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.