Development Director
Rian Johnson first conceived of
Knives Out after the completion of the low-budget thriller
Brick (2005), his first feature film. His idea was influenced by
film adaptations of books by detective fiction writer
Agatha Christie that he enjoyed as a child. Once he had determined the story's goal, Johnson began conceiving ideas for the plot structure, mainly a framework of tonal shifts he devised to incite tension in the story. His experience witnessing the intense
culture war backlash to
The Last Jedi became another source of inspiration for the
Knives Out story. Johnson began scriptwriting by January 2018, immediately after finishing his press tour for
The Last Jedi, in a process lasting between six and seven months, depending on the source. He took the name Harlan Thrombey from a 1981
Choose Your Own Adventure whodunit,
Who Killed Harlowe Thrombey? Media coverage of
Knives Out gives conflicting accounts of the film's funding. One report circulated by
Deadline said
MRC secured the script in an auction hosted by
Creative Artists Agency and
FilmNation to investors at the
43rd Toronto International Film Festival. For
Knives Out commercial distribution, MRC partnered with
Lionsgate, which was trying to recover from a year of mediocre box office showings and purchased a partial share of the
distribution rights.
Casting Employing an
ensemble cast of established stars was one of Johnson's initial demands. He drew upon the Agatha Christie films—chiefly
Peter Ustinov-starred projects à la
Death on the Nile (1978) and
Evil Under the Sun (1982)—for his casting choices because he felt they have a sense of spectacle that was worth replicating. The filmmakers focused on actors who were available in the six week period before filming for
Knives Out began. Actors were chosen for their ability to stand out in bit speaking parts and master an exaggerated, but not
caricatured, comic performance. Most of the
Knives Out ensemble were signed in October and November 2018. Johnson named each of the characters after musicians whose works he enjoyed because it was a simple practice to remember—for example,
Joni Mitchell,
Richard Thompson, and
Steely Dan's
Donald Fagen. Daniel Craig came to Johnson's attention for his stage work and non-
James Bond film roles. Johnson regarded Craig as a versatile actor who wanted to challenge his abilities in a playful comedy role. Once Craig read his copy of the script, he agreed to join because the writing's tone and humor captivated him. The treatment of Blanc was initially a fruitless task for Johnson; his first concept had been a
Hercule Poirot clone "that was just a bunch of crazy quirks". To distinguish the character, Johnson outlined Blanc as a slightly pompous man with a flamboyant
Southern accent, turning to Craig's ongoing feedback for a unique characterization. Casting director Mary Vernieu was responsible for casting Marta Cabrera. Vernieu and the filmmakers did not favor a particular person for the part, unlike the other
Knives Out characters, and based their search on Johnson's preference for a relatively unknown actor that could exhibit an underdog-like quality. Johnson liked de Armas' acting but believed she was too beautiful to convincingly portray Cabrera. Cabrera's immigrant backstory also resonated with de Armas. For the self-indulgent Ransom Drysdale, Johnson envisioned
Chris Evans after seeing him in the 2018
Broadway revival of
Kenneth Lonergan's Lobby Hero, having been impressed with his performance as a contemptible villain. Evans was mainly known for his live-action role as
Steve Rogers / Captain America in the
Marvel Cinematic Universe (MCU) and Johnson aimed to use Evans'
everyman persona to create tension between moviegoers and Drysdale, saying: "You've got to see it not as baggage, but as ammunition. If there was someone in that part who the audience inherently wanted to like, that would help the
arc overall".
Christopher Plummer, in one of his final film appearances before his death in 2021, described Harlan as a "stern, bright and rough-hewn" father with a crass sense of humor.
Michael Shannon did not audition for the role of Walt and was contracted following an arranged lunch with Johnson.
Filming Bergman was assembling the filmmaking crew while Johnson revised the script in early 2018. Bergman scouted several homes with his team before centering the film's production on two sprawling mansions in suburban
Boston: a privately owned nineteenth-century
Gothic Revival manor that was used for exterior shots, and Ames Mansion, a 20-room historic landmark in
Borderland State Park in
Easton. Most of the interior shots, including intense, confrontational scenes with Harlan and his relatives and conversational scenes of Blanc's investigation, took place in Ames Mansion. The filmmakers converted vacant retail space into a laundromat in preparation for the first shoot. Elsewhere in
Greater Boston, scenes were filmed near an
MBTA passenger rail station in downtown
Natick; a private,
mid-century modern estate in
Lincoln,
Canton,
Wellesley,
Waltham,
Medfield; and an unoccupied, state-owned facility in
Marlborough that was chosen for its round shape. The Marlborough location was used for exterior scenes at the burned-down medical examiner's office; the scene involved
pyrotechnics and a group of local firefighters were used as
extras portraying a firefighting operation. Filming for the project took approximately 38 days and ended on December 20, 2018.
Cinematography Knives Out was director of photography
Steve Yedlin's fifth project with Rian Johnson. Yedlin and Johnson
storyboarded their visual composition ideas before principal photography, which did not describe the onscreen universe in depth. A
double-camera setup was used with two
operators, one a longstanding collaborator of Yedlin. Yedlin described the on-set environment as experimental and visually creative. They also used
Panavision's PCZ Primo 19–90 and PZW 15–40
zoom lenses because
zooming is customary in Johnson's oeuvre. The design team were drawn to Ames Mansion because the original architectural elements had been preserved, endowing the sets with an aged quality. They located the film's decorative items from a range of businesses, souvenir collectors, and ordinary people in Boston and
New York City. Their first conversation concerned the context of music in the opening scenes, and they sought a score that reflected the film's key events and drama with an abrasive
classical sound. Nathan recorded the
Knives Out score with an orchestra at
Abbey Road Studios in
London, UK. To prepare, Nathan Johnson engaged the production while principal photography was ongoing; he visited the set to gain a premise for melodic cues and motifs. This was an uncommon experience as the standard industry practice for composers is to work in post-production after filming has finished. Nathan and Rian were inspired for
Knives Out musical direction by their favorite symphonic film scores, such as
Death on the Nile (1978),
Lawrence of Arabia (1962), and the compositions of
Bernard Herrmann. ==Themes==