Summary
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Regretting You features a strong cast led by Allison Williams and Mckenna Grace.
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The film follows a fractured mother-daughter relationship rebuilt after tragedy.
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The romantic drama arrives in UK cinemas on Friday, 24th October 2025.
The Regretting You cast brings familiar faces and rising talent to Colleen Hoover’s bestselling story. Directed by Josh Boone, the adaptation focuses on a mother and daughter whose lives change overnight when tragedy strikes their family. With its emotion-driven plot, the film relies heavily on chemistry between its leads and this ensemble looks ready to deliver. Here’s who plays who in Regretting You and where you’ve seen them before.
Who is in the Regretting You cast?
The confirmed Regretting You cast includes a mix of well-known film stars, television favorites, and promising young actors. Each performer plays a character central to the novel’s themes of grief, love, and second chances.
Here’s the full cast list in an easy reference table:
| Actor | Character | Character Overview |
|---|---|---|
| Allison Williams | Morgan Grant | Clara’s mother; navigating loss and fractured family bonds |
| Mckenna Grace | Clara Grant | Morgan’s teenage daughter; developing feelings for Miller |
| Dave Franco | Jonah Sullivan | Morgan’s brother-in-law and complex friend |
| Mason Thames | Miller Adams | Clara’s love interest |
| Scott Eastwood | Chris Grant | Morgan’s husband and Clara’s father |
| Willa Fitzgerald | Jenny Davidson | Morgan’s sister and confidante |
| Clancy Brown | Hank “Gramps” Adams Sr | Miller’s supportive grandfather |
| Sam Morelos | Lexie | Clara’s best friend |
| Ethan Costanilla | Efren | Clara’s circle |
| Luke Pierre Roness | Hank Adams Jr | Member of Miller’s family |
| Daniel Smith | Pastor | Faith-oriented support in the community |
| Alicia Cuthbertson | ER Desk Attendant | Works at the hospital during tragedy |
| Marcelle LeBlanc | Tonya | Personal connection in Clara’s world |
| Kurt Yue | Doctor | Hospital staff |
| William Burnham Simmons | Elijah | Supporting role |
| Joe Binford Jr | Voice of DJ | Heard throughout the film |
Now, let’s break down the key roles and the stars behind them.
READ MORE: Complete Soundtrack of Regretting You
Who plays Morgan Grant in Regretting You?
Allison Williams as Morgan Grant
Who is Morgan?
Morgan is Clara’s devoted but strict mother. When tragedy upends their lives, old wounds resurface as she tries to protect her daughter — even if it pushes Clara further away.
Where have you seen Allison Williams?
Williams is known for dramatic and genre-shifting roles:
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Girls (HBO)
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Get Out
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A Series of Unfortunate Events
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Fellow Travelers
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The M3GAN film series
She brings both emotional range and intensity to Morgan’s character arc.
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Who plays Clara Grant in Regretting You?
Mckenna Grace as Clara Grant
Who is Clara?
Clara is Morgan’s teenage daughter struggling with grief, independence, and first love as she grows increasingly distant from her mother.
Where have you seen Mckenna Grace?
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I, Tonya
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Captain Marvel
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Fuller House
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Ghostbusters: Afterlife + Frozen Empire
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The Haunting of Hill House
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The Handmaid’s Tale
Grace has built one of the most impressive resumes of her generation — making her a strong fit for a character navigating emotional complexity.
READ MORE: Nobody Wants This Real Story: The True Romance Behind Netflix’s Hit Rom-Com
Who plays Jonah Sullivan in Regretting You?
Dave Franco as Jonah Sullivan
Who is Jonah?
Jonah is Morgan’s brother-in-law — someone significant to both Morgan and Clara after the family tragedy shakes up their relationships.
Where do you know Dave Franco from?
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Superbad
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21 Jump Street
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The LEGO Movie
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The Disaster Artist (as Greg Sestero)
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Together (alongside Alison Brie)
His layered roles make him well suited for Jonah’s sensitive, complicated storyline.
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Who plays Miller Adams in Regretting You?
Mason Thames as Miller Adams
Who is Miller?
Miller is the charming teenager who becomes Clara’s romantic partner, adding both comfort and conflict to her world.
Where have you seen Mason Thames?
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Lead role in The Black Phone (and its sequel)
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How to Train Your Dragon (2025) — live-action Hiccup
Thames continues his streak as a compelling young lead.
Who plays Chris Grant in Regretting You?
Scott Eastwood as Chris Grant
Who is Chris?
Chris is Morgan’s husband and Clara’s father — a figure whose presence shapes the story’s key emotional beats.
Notable performances:
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Suicide Squad (2016)
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Fast & Furious franchise (Fast X, among others)
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Pacific Rim Uprising
Eastwood brings familiarity for fans of big-budget action films.
Who plays Jenny Davidson in Regretting You?
Willa Fitzgerald as Jenny Davidson
Who is Jenny?
Jenny is Morgan’s sister and closest confidante — part of the family’s inner world.
Where have you seen Willa Fitzgerald?
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Strange Darling
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Gotham
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House of Cards
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The Fall of the House of Usher
Her roles often carry emotional tension and nuance.
READ MORE: Meet the Nobody Wants This Season 2 Cast
Who plays Gramps in Regretting You?
Clancy Brown as Hank “Gramps” Adams Sr
Who is Gramps?
Miller’s supportive grandfather and a grounding force in the story.
Clancy Brown’s massive career includes:
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Voice work — Savage Opress (Star Wars: The Clone Wars), Lex Luthor (LEGO Batman)
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Live-action roles — John Wick: Chapter 4, The Penguin series
He brings authority and warmth to the role.
Who plays Lexie in Regretting You?
Sam Morelos as Lexie
Who is Lexie?
Clara’s best friend and trusted confidant throughout the film.
Where you’ve seen Morelos:
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Nikki in That ’90s Show
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Descendants: The Rise of Red
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Various independent shorts
Morelos adds a youthful energy that matches Clara’s perspective.
READ MORE: Is HBO Building a Stephen King Universe with It: Welcome to Derry?
When is Regretting You released?
The film will be available on the big screen first:
Regretting You releases in UK cinemas on Friday, 24th October 2025.
Streaming platforms and digital release dates are expected to follow after the theatrical window, with details to be confirmed later.
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