Ana de Armas delivered a career-defining performance as Marta Cabrera in Rian Johnson’s 2019 whodunnit, Knives Out. Playing a compassionate nurse caught in a web of greed and murder, de Armas served as the film's moral compass and true protagonist, ultimately earning a Golden Globe nomination and transitioning from a rising star to a Hollywood A-lister.
The character of Marta Cabrera is not just a witness or a secondary player in the mystery of Harlan Thrombey’s death; she is the lens through which the audience experiences the entire narrative. While the marketing initially focused on the star-studded ensemble—including Daniel Craig, Chris Evans, and Jamie Lee Curtis—it is de Armas who carries the emotional weight of the film. In the years since its release, her performance has remained a benchmark for how modern mysteries can integrate deep social commentary with character-driven storytelling.
The Role of Marta Cabrera: More Than a Caretaker
In Knives Out, Marta Cabrera is the devoted nurse and closest confidante of the wealthy crime novelist Harlan Thrombey (played by Christopher Plummer). Following Harlan’s apparent suicide, Marta finds herself at the center of a high-stakes investigation led by the eccentric private eye Benoit Blanc.
Unlike the members of the Thrombey family, who are driven by entitlement and the prospect of an inheritance, Marta is motivated by genuine grief and a desperate need to protect her family. Her character serves several narrative functions:
- The Moral Center: In a house full of "vultures," Marta is the only person who actually cared for Harlan as a human being rather than a source of income.
- The Unreliable Reliable Witness: Because of a unique physiological condition—an inability to lie without vomiting—she is technically the most honest person in the film, yet she is forced to hide a secret that could destroy her life.
- The Underdog: As the daughter of an undocumented immigrant, Marta faces systemic pressures that the Thrombeys use as leverage against her, making her victory at the end of the film significantly more impactful.
The "Honest" Protagonist: Analyzing the Regurgitation Reflex
One of the most discussed "technical" aspects of Ana de Armas’s role is Marta’s physical reaction to lying. Rian Johnson used this trait as a brilliant narrative device to heighten tension. In a traditional whodunnit, the audience is used to characters lying through their teeth. By making Marta literally unable to lie without a violent physical reaction, Johnson creates a "ticking time bomb" scenario every time she is questioned by Benoit Blanc.
This trait required Ana de Armas to balance physical comedy with genuine anxiety. She had to convey the internal struggle of a woman trying to navigate a legal minefield while her own body betrayed her. This "regurgitation reflex" isn't just a gag; it is a manifestation of her innate goodness. In a world where the Thrombeys lie effortlessly to maintain their status, Marta’s body rejects the very concept of deceit.
Casting Ana de Armas: From Initial Hesitation to Global Stardom
Before Knives Out, Ana de Armas was primarily known for her roles in Blade Runner 2049 and War Dogs. When she first received the script for Knives Out, she was reportedly hesitant. The initial character description for Marta was simply "Latina caretaker, pretty," which de Armas feared would be a one-dimensional stereotype.
However, after reading the full script and meeting with Rian Johnson, she realized that Marta was the most complex and powerful character in the story. De Armas’s casting was a pivot point for the production. She brought a vulnerability and a "doe-eyed" innocence that made the audience immediately defensive of her, even when the plot suggested she might be responsible for Harlan’s death.
By the time the film reached its conclusion—with Marta standing on the balcony of the estate, sipping from a "My House, My Rules, My Coffee" mug—de Armas had successfully transitioned from a supporting actress to a powerhouse lead.
Chemistry with the Ensemble: Blanc and Ransom
A significant portion of the film’s success relies on the chemistry Ana de Armas shares with the two male leads: Daniel Craig and Chris Evans.
The Partnership with Benoit Blanc
The dynamic between Marta and Benoit Blanc (Daniel Craig) is a subversion of the typical Holmes and Watson relationship. Blanc views Marta as his "Watson," utilizing her honesty to navigate the lies of the family. However, Marta is simultaneously trying to outmaneuver Blanc. De Armas plays this cat-and-mouse game with remarkable subtlety, showing the audience her fear while maintaining a facade of cooperation for Blanc.
The Contrast with Ransom Drysdale
Conversely, her interactions with Ransom Drysdale (Chris Evans) provide the film’s most dangerous friction. Ransom is the "black sheep" who appears to be Marta’s only ally. De Armas portrays Marta’s desperation brilliantly here; she is so isolated that she is willing to trust the one man who is just as manipulative as the rest of his family. The reveal of Ransom’s true nature works only because de Armas has sold the audience on Marta’s belief in his potential goodness.
The Socio-Political Undercurrent of Marta’s Journey
Knives Out is frequently cited for its sharp social commentary, specifically regarding class and immigration in America. Marta Cabrera is the vessel for this critique. Throughout the film, the Thrombeys repeatedly insist that Marta is "part of the family," yet they cannot agree on her country of origin—variously claiming she is from Ecuador, Paraguay, Uruguay, or Brazil.
Ana de Armas handles these scenes with a quiet, observant dignity. She captures the experience of a person who must remain invisible and agreeable to survive in a space defined by white wealth. The threat of her mother’s deportation is a shadow that looms over her every decision, adding a layer of "real-world" stakes that the Thrombeys’ financial squabbles lack.
| Aspect of Character | Narrative Function | Theme Represented |
|---|---|---|
| Medical Profession | Caregiver and healer | Empathy vs. Greed |
| Vomiting Reflex | Plot obstacle and "truth serum" | Moral Purity |
| Immigration Status | High-stakes vulnerability | The American Dream/Systemic Inequality |
| Inheritance | The "Winner" of the mystery | Meritocracy and Justice |
| Relationship with Harlan | The catalyst for the plot | Found Family vs. Blood Family |
Critical Reception and Career Impact
The critical response to Ana de Armas in Knives Out was overwhelmingly positive. Reviewers praised her ability to hold her own against veterans like Christopher Plummer and Jamie Lee Curtis. She received a Golden Globe nomination for Best Actress in a Motion Picture – Musical or Comedy, a rare feat for a performance in a genre film.
This role served as a massive springboard. It directly led to her casting as Paloma in the James Bond film No Time to Die (reuniting with Daniel Craig) and her Academy Award-nominated turn as Marilyn Monroe in Blonde. As of 2026, looking back at her filmography, Knives Out remains the pivotal moment where she proved she could carry a major studio production both critically and commercially.
Performance Analysis: The "Donut Hole" Scene
Perhaps the most technical piece of acting de Armas performs is during the "Donut Hole" monologue delivered by Benoit Blanc. While Daniel Craig delivers the eccentric dialogue, the camera often lingers on de Armas’s face. In these moments, she is performing a "reaction-based" masterclass.
She must convey:
- The fear that Blanc has discovered her secret.
- The confusion at his bizarre metaphors.
- The exhaustion of being chased by a family of sociopaths.
- A growing sense of resolve.
This "silent acting" is what elevated the movie from a standard mystery to a character study. She doesn't need dialogue to tell the audience that Marta is reaching her breaking point.
Comparing Marta to Other Characters in the Franchise
With the expansion of the Knives Out universe into sequels like Glass Onion (2022) and the more recent Wake Up Dead Man (2025/2026), fans often compare de Armas’s Marta to subsequent protagonists. While Janelle Monáe delivered a powerful performance in the second installment, Marta Cabrera remains the most "human" protagonist of the series.
Unlike the characters in the sequels who are often insiders or peers of the wealthy antagonists, Marta is a true outsider. Her victory is not just about solving a puzzle; it is about surviving a predatory system. This distinction is why Ana de Armas’s role continues to be the fan favorite even years after the original film's release.
Frequently Asked Questions
Did Ana de Armas actually vomit in Knives Out?
No, the vomiting scenes were achieved through practical effects and clever editing. A small tube was often hidden near her mouth or she used a prop "vomit" mixture. However, de Armas’s physical commitment to the gag—the retching and the watering eyes—was entirely her performance, making the uncomfortable moments feel grounded in reality.
What is Marta Cabrera's nationality in the movie?
The movie intentionally keeps this ambiguous to highlight the ignorance of the Thrombey family. Different family members claim she is from different South and Central American countries. In reality, the character's family is from an unspecified Spanish-speaking country, and the ambiguity serves as a satirical point about how the wealthy "other" those who serve them.
Did Ana de Armas win any awards for Knives Out?
While she did not win the Golden Globe, she won several critics' choice awards and breakout performance honors. Specifically, she won the Saturn Award for Best Supporting Actress and was part of several "Best Ensemble" wins from various critics' associations.
Why was Marta Cabrera chosen as Harlan’s heir?
Harlan chose Marta because she was the only person in his life who wasn't trying to get something from him. He saw his children and grandchildren as "spoiled and entitled," and he wanted to give his fortune to someone who would use it for good and who had earned his respect through genuine friendship and professional care.
Will Ana de Armas return for future Knives Out sequels?
As of 2026, there are no official plans for Marta Cabrera to return. Rian Johnson has stated that the Knives Out franchise is an anthology series centered on Benoit Blanc. However, Marta's legacy is often referenced by fans as the blueprint for the "honest protagonist" that the series strives to replicate.
Practical Takeaway: Where to Watch and What to Look For
If you are revisiting Knives Out in 2026, pay close attention to Ana de Armas’s eyes during her first interview with the police. You can see the exact moment she decides to withhold information, contrasted with the physical toll that decision takes on her. Her performance is a textbook example of how to play a character who is "hiding in plain sight."
For those following de Armas's career, Knives Out is best viewed alongside her role in No Time to Die. The contrast between the nervous, vomit-prone Marta and the high-kicking, confident Paloma shows the incredible range that de Armas developed in a very short window of time.
