IF is a 2024 American fantasy comedy film written, produced, and directed by John Krasinski. The film features an ensemble cast that includes Cailey Fleming, Ryan Reynolds, John Krasinski, Fiona Shaw, Alan Kim, and Liza Colón-Zayas, along with the voices of Phoebe Waller-Bridge, Louis Gossett Jr., and Steve Carell. Its plot follows a young girl and her neighbor who find themselves able to see imaginary friends.

Plot

Twelve-year-old Bea moves into her grandmother Margaret's apartment in New York while her father waits for heart surgery in the same hospital where her mother died of cancer years earlier. She chafes against his playful antics, insisting she can handle the situation with maturity. One night, Bea goes out to buy a charger for her mother's old camcorder and sees an unfamiliar creature, following it back to her grandmother's building. The next day, she sees the creature again, accompanied by a man. Bea follows them to a nearby house where the man, Cal, retrieves a large furry purple creature named Blue. She also meets the other creature, a butterfly-like being named Blossom, and faints. She awakens in Cal's apartment where she learns that he has been working with imaginary friends, nicknamed IFs, to place them with new children as their original children have grown up and forgotten them. Initially reluctant, Bea eventually decides to help Cal.