The film's director and lead actor, John Krasinski, played the monster in a motion capture suit for a few scenes.
Actress Millicent Simmonds has been deaf since infancy due to a medication overdose. This was the second film she starred in, with Wonderstruck (2017) being her first.
Bryan Woods and Scott Beck's original screenplay contained only one line of dialogue.
The bathtub scene with Emily Blunt was done in one take. According to John Krasinski, as soon as he said, "Cut," Blunt immediately fell out of character and asked the crew, "What's everyone having for lunch?"
Actor-director John Krasinski has said that the single greatest compliment he received regarding the film, was in a tweet from the master of the horror story himself, Stephen King: "A QUIET PLACE is an extraordinary piece of work. Terrific acting, but the main thing is the SILENCE, and how it makes the camera's eye open wide in a way few movies manage" (6 April 2018).
There are real family photos of John Krasinski and Emily Blunt and their children used in the film.
The device Regan wears is not a hearing aid, but a cochlear implant. This indicates that Regan has a sensorineural hearing loss, which means her inner ear has sustained some sort of damage. The cochlear implant translates vibrations in the air into nerve impulses that the brain perceives as sound.
The opening sequence was the last to be shot, as it required John Krasinski to shave most of his beard.
Since the characters communicate in American Sign Language to avoid making sound, filmmakers hired deaf mentor Douglas Ridloff to teach ASL to the actors and to be available to make corrections.
It was initially intended to leave the American Sign Language un-subtitled, believing the audience would understand the subtext of what was going on. Notably, the first trailer does not subtitle the signing. However, while editing the sequence where Regan argues with her father regarding her hearing aids, it was decided by the filmmakers that the sequence would have to be subtitled. Subsequently all use of ASL throughout the movie was subtitled.
John Krasinski almost turned down this film just as he was about to start work on the series Tom Clancy's Jack Ryan (2018). When asked by the producers if he'd be interested in appearing in a horror film, John replied that he did not do horror. But when he was presented with the premise about a 'family that can't make any noise and you have to figure out why,' he jumped on board straight away.
The final look of the creature wasn't fully figured out until pretty late in the process, during post-production.
Bryan Woods and Scott Beck's screenplay was named one of the ten best scripts of the year on Tracking Board's 2017 Hit List, an annual list voted on by industry professionals.
The film was written by Scott Beck and Bryan Woods for Paramount, who submitted the script to John Krasinski to star. Krasinski's wife, Emily Blunt, also read the script and then wanted to co-star in the film. In addition to starring in the film, Krasinski is the film's director.
Doors are never opened or closed throughout the entire film, except the truck's near the end.
During filming, the crew avoided making noise so diegetic background sounds (e.g., the sound of rolling dice on a game board) could be recorded; the sounds were amplified in post-production.
In an interview with the website SlashFilm, screenwriters Scott Beck and Bryan Woods revealed that Paramount Pictures originally intended to incorporate A Quiet Place (2018) into the studio's Cloverfield (2008) film franchise. As Beck said in the interview, "I guess it crossed our mind and we had spoken to our representatives about that possibility. It was weird timing, though, because when we were writing the script, 10 Cloverfield Lane (2016) was at Paramount. We were actually talking to an executive there about this film, and it felt from pitch form that there might be crossover, but when we finally took the final script in to Paramount, they saw it as a totally different movie." The screenwriters and director John Krasinski were ultimately relieved and grateful for Paramount to finally decide to allow them to make the film as a wholly original, stand-alone film, rather than to make it as a part of the Cloverfield film franchise, or any other film franchise for that matter. "One of our biggest fears was this [the film] getting swept up into some kind of franchise or repurposed for something like that," Woods added. "The reason I say 'biggest fear' - we love the 'Cloverfield' movies. They're excellent. It's just that as filmgoers, we crave new and original ideas, and we feel like so much of what's out there is IP. It's comic books, it's remakes, it's sequels. We show up to all of them, we enjoy those movies too, but our dream was always to drop something different into the marketplace, so we feel grateful that Paramount embraced the movie as its own thing."
John Krasinski and Emily Blunt are married both in this film and in real life. As of the film's release, they have two daughters.
In an interview with E!, John Krasinski said, "I would love to direct Emily Blunt, [but] I'd rather act with Emily than direct. I don't know if I need that responsibility. She's so good and I'd be so scared to screw it up, but [I'd be] happy to be in scenes with her. That would be really fun. We're always up for doing something. It's just got to be the right thing...Give us a good one! I would love it!"
The first proper line of dialogue isn't spoken until about 38 minutes into the film.
The bridge featured in the movie is the Wallkill Valley Rail Trail Bridge in New Paltz, New York.
John Krasinski wanted his movie creature to be extra special and so discussed its general design and animations with Industrial Light & Magic (ILM) veteran visual effects wizard Scott Farrar, who'd been responsible for some of the memorable effects in such films as Cocoon (1985), Backdraft (1991) and Transformers (2007).
Emily Blunt mentioned in interviews that she initially advised John Krasinski to cast her friend for the role of Evelyn Abbott. After reading the script (and loving it and the character), Blunt asked her husband to cast her instead. (The actress had not yet been hired anyway.)
This film marks the first time real-life couple John Krasinski and Emily Blunt star alongside each other. They both appeared in The Muppets (2011), but did not share any scenes.
The initial inspiration for Millicent Simmonds' deaf character came from an earlier character sketch in Scott Beck and Bryan Woods' unfinished screenplay "The Piper," which was an adaptation of the Pied Piper of Hamelin.
Although the film was a box-office success, movie theatre businesses presenting it likely grew less enthusiastic about it. That was because the film's ambiance about the need to maintain silence in the story was convincing enough that many audiences at screenings grew unusually quiet themselves as if they subconsciously felt were they should be themselves. As such, anyone eating in the auditorium was frowned upon severely by others in the room. As such, concession stand sales, a major income stream for movie theaters, was notably limited for audiences of that film.
During the press tour of this film, fans have grown to love John Krasinski and Blunt's chemistry as a real life couple. They eventually turned out to be many of the fans' top choice for Reed Richards and Sue Storm for the next Fantastic Four reboot, should there be any. Krasinski has expressed interest in pursuing the role.
One of the taglines for the movie is "red means run." A Song by Neil Young, "Powderfinger," includes the line "Red means run, son." Neil Young's song, "Harvest Moon" is the only song in the movie.
In order to connect with the characters, John Krasinski edited the first two cuts of the movie without any sound. According to the director, the movie could work without any sound whatsoever.
The family name is Abbott. An abbot in Catholicism is the leader of a monastery. Abbots in monasteries, like Mr. and Mrs. Abbott, lead self sufficient communities which often support themselves through means such as farming, like the family in the film. Some monasteries are also silent, and so members will not wear shoes, will communicate infrequently with spoken language, and will pray together in silence like the family in the film.
While Evelyn is homeschooling her son Marcus, written on a whiteboard at the back is the first quatrain from William Shakespeare's Sonnet 18.
Production designer Jeffrey Beecroft headed the creature design, and special effects supervisor Scott Farrar created the creatures.