If I Had Legs I'd Kick You true story: Mary Bronstein wrote it while her daughter was in treatment

Rose Byrne spends If I Had Legs I'd Kick You coming apart in real time: her character Linda is a psychotherapist stuck in a Montauk motel with a chronically ill daughter, a flooded flat, a ceiling with a hole in it and a husband who phones in his criticism. Awards bodies rather lost their minds over it — Byrne took the Silver Bear at Berlin, the Golden Globe, and an Oscar nomination for the A24 release.

The uncomfortable bit is how much of it writer-director Mary Bronstein didn't have to invent. Her own daughter became seriously ill at seven and needed specialist treatment in California. The family packed for six weeks. Perhaps eight, worst case. They were there eight months, living out of a motel — the film's entire pressure-cooker geography, transplanted from life.

Read more: Is The Notebook a true story? Sparks borrowed it from two people in his wife's family

The bathroom confession

Bronstein has been disarmingly frank about how she coped in that motel, and it's rather bleaker than any press-tour anecdote has a right to be:

"I'd turn the light on, drink disgusting $9 wine, eat junk food... Just binge eat and binge drink."

Hiding in the loo at night while your child sleeps, coming undone in private and presenting a capable face by morning — that is, more or less, the film. Linda's therapist (Conan O'Brien, cast brilliantly against type) and her motel neighbour (A$AP Rocky, of all people) orbit a woman doing exactly this.

Where the line actually sits

Bronstein is careful about the word "autobiographical," and the distinction she draws is worth keeping straight:

"It's not autobiographical — it's emotionally true, expressively true."

The practical translation of that:

• The situation is real — the ill child, the treatment far from home, the motel, the timeline that kept stretching. Bronstein began writing during the illness itself, and the script took two years to finish.
• Linda's actions are not — Bronstein didn't do the things her heroine does; she built a fictional woman to carry a documentary-grade emotional load.
• The method was airtight: no improvisation, everything from the page, workshopped with Byrne over six weeks of kitchen-table sessions, three times a week, before cameras rolled.
• The daughter is fine, which Bronstein offers as the story's one unambiguous mercy — she's fifteen and a half now and doing well.

The film premiered at Sundance in January 2025 and reached cinemas that October, by which point Bronstein's daughter was old enough to know exactly what her mum had made from those eight months. The child in the film, pointedly, is kept almost entirely off screen — a voice, a demand, a weight. The face belongs to the real one.

Earlier we wrote: If I Had Legs I'd Kick You: does the daughter die? The last ten minutes might not be happening at all