There’s a particular kind of enchantment that takes place when an actor who has been poked and prodded and told what to do for most of their life steps behind the camera. They don’t just make a movie, they curate a performance. British cinema, 2026 appears to be staking out the title of year of the actor-auteur. First up was Outlander Star Rosie Day. If you don’t know her by that name, then you will know her as the tough Mary Hawkins in Outlander or the quietly brutal lead in The Seasoning House.
But now, Outlander Star Rosie Day is swapping the corset for the director’s monitor to make her feature directorial debut with One Hundred and Fifty-Two Days – it seems less a debut and more a manifesto. Starring powerhouse talent such as Alistair Petrie (The Night Manager), Roman Griffin-Davis (Jojo Rabbit), and Alice Lowe (Timestalker) this isn’t just another indie drama — it’s a “a sucker punch to the heart.”
Rosie Day Evolution From “Teenage Armageddon” to the Director’s Chair
Outlander Star Rosie Day career has been shaped by parts that require her to be emotionally and physically tough. Mary Hawkins in Starz’s Outlander Star Rosie Day, which made her deal with complex trauma, sexual assault and historical repression. Likewise, The Seasoning House (her starring role) allowed Gara to express deep emotions with very little verbal exchange.

Outlander Star Rosie Day has never been afraid to explore the darker corners of human life. Acting, writing her hit book Instructions for a Teenage Armageddon – her goal has always been to “give the microphone back” to young people.
Rosie Day’s Vision
Statement on the production Day described the visceral impact of the script:
“One Hundred and Fifty Two Days is a deeply moving and powerful piece, with its hilarious moments perfectly balanced by tears. There’s a rarely seen screenplay that makes you experience so many feelings and turns that I can tell you this is a very moving experience.”
That quote is indicative of the film’s tone. This is not to imply that Day is turning out a grim melodrama. “Laughing” could indicate she’s embracing the absurdity of grief—strange encounters along the way, the dark comedy of hospitals and, yes, the grandmother figure. She added further about her excitement to ensemble:
“It’s going to be an amazing ride to watch, and I can’t wait to see where it goes!”
The Author’s “Deeply Personal” Adaptation
An otherwise undisclosed member of the writing duo, Giles Paley-Phillips (involved from the outset) has co-written the screenplay. He has spoken of the journey as being:
“I’m so grateful to be on this amazing journey working with such an incredible team and creative minds to tell this story. This is really rewarding on a personal level, and I’m very lucky to be doing it.”
The “personal” nature of this may be that it is autobiographical to some extent: Paley-Phillips has openly talked about losing his mother and how grief has influenced his life and his work. When a writer films their own story, especially one involving personal trauma, there is usually greater truth to the emotional story.
The pairing with Elizabeth Morris is a strategic one, Morris presumably grounds Paley-Phillips’s poetic tendencies with the requisite structural discipline of screenwriting.
The Plot: A Pressure Cooker of Isolation
The narrative of One Hundred and Fifty-Two Days is almost sadly poetic.
- The Hero: A teenage boy (the brilliant Roman Griffin-Davis) who has a raging case of pneumonia.
- The Tragedy: His mother is receiving terminal cancer treatment as he gasps for air.
- The Twist: He is prevented from visiting his daughter because he is ill.

He must mourn from afar, stuck in medical limbo. It’s a story about the 152 days that define a life — a “blank” moment during which everything stops, yet everything changes.
Cast and Their Masterpiece Acting
The casting of One Hundred and Fifty-Two Days demonstrates a conscious effort to mix star appeal with proven character-actor skill.
| Actor |
Known For |
Narrative Archetype |
Key Plot |
| Roman Griffin |
Jojo Rabbit, Silent Night |
The Boy (Protagonist) |
After Jojo Rabbit, we know he can hold the weight of a film’s soul on his shoulders. |
| Alistair Petrie |
The Night Manager, Sex Education |
The Father (Likely) |
Specializes in repressed authority figures. Perfect for a father who uses silence and rigidity (or alcohol) as a shield against grief. |
| Alice Lowe |
Timestalker, Prevenge |
Physiotherapist / Relative |
Known for dark comedy. Will likely inject the “laugh” element Rosie Day mentioned, preventing the film from becoming maudlin. |
| Annette Badland |
Ted Lasso, Outlander |
The Grandmother (Likely) |
A veteran character actress capable of great warmth and steel. A former colleague of Day from Outlander. |
| Paterson Joseph |
Wonka, Peep Show |
Doctor / Mentor |
brings a charismatic gravitas. Can play the “institutional face” of the hospital or a supportive family friend. |
Why One Hundred and Fifty-Two Days Theme Hit Deeply?
Both the book and its later film version are profoundly resonant with our collective experience of the COVID-19 pandemic, though they were imagined well before its arrival. Its portrayal of a respiratory disease that causes isolation and separation is uncannily reminiscent of what people around the world are experiencing. This link lets viewers infuse their own recollections of lockdown, loss, and resilience into the story.
Under Outlander Star Rosie Day direction, the film turns into a bittersweet portrayal of shared trauma, affirming the anguish of separation and the emotional impact of medical crises on people and families as a whole.
Outlander’s Rosie Day Find Deeper Connection One Hundred and Fifty-Two
The film is about grief and the male frailty and it subverts all the expected ones. By introducing the character of the “whimsical grandmother” as a vehicle for the grieving process being non-linear, it suggests the presence of life and death simultaneously and encourages the main character to live while losing. This say-turning laughter and tears up the complexity of loss. And the fact that they’re allowed to be vulnerable men and that is important in itself.

The Boy’s vulnerability and need for guidance stand in stark contrast to the Father’s repressed emotions, represented by his struggle with alcoholism. These aspects serve to demonstrate that mental health care, and particularly that of teenage boys and men, can be treated with compassion and realism — before our very eyes, in true Day fashion.
The Rosie Day & Alistair Petrie Connection
Outlander Star Rosie Day and Alistair Petrie, in fairness, aren’t just colleagues, they have a professional shorthand. Previously seen together at industry functions such as The Uninvited screening last year, it’s probably a safe assumption that their relationship brings a sense of trust on set that you can’t just make up.
When a director and their lead actor “speak the same language”, the performance is usually ten times stronger.
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What to Expect: Poetic Realism
Don’t expect your typical “hospital movie.” Since the original book was written in free verse, expect the film to rely on silence and visual metaphors rather than heavy dialogue.
Rosie Day’s previous short films, like Tracks, have told us she’s a filmmaker who can make the most of every moment on screen. In One Hundred and Fifty-Two Days, she is transposing poetry’s “white space” to the “quiet space” of cinema.
Verdict: This is a film about male vulnerability, the absurdity of grief, and the odd people (an “erratic” grandmother or a no-nonsense physiotherapist) who reel us back into the living world.
Conclusion
One Hundred and Fifty-Two Days would undoubtedly be a milestone in British film making when it is completed in 2027. This film elevates the basic tenets of the best-seller adaptation formula with an organic synthesis of art and commerce.
Outlander Star Rosie Day, making the leap from in front of the camera, applies her “teenage armageddon” concept to a sensitivity study of male frailty. Alistair Petrie assumes a role that questions his hardline authoritarian identity, with the pandemic shadowing, highlighting themes of solitude and reflection.
What makes the project unique, however, is its subtle narrative — about a boy fighting for breath — told by a director who is dedicated to telling the stories of young people. Should Day get her wish and meld emotional grit with comic relief, she’ll be further established as a sensitive auteur reflecting on the mess of being.
Production is underway on Britain’s craggy northern shoreline for what could be another classic of modern British social realism.
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