Colleen Hoover’s tear-jerking novels have a way of sticking with readers long after the last page — and Regretting You is no exception. The adaptation was announced in 2024, with production completing in August 2025, and now there’s finally a full cast list to explore — with familiar faces alongside rising talents bringing Morgan, Clara, and that complicated family to life on screen.

4 related posts

Lead Actress: Allison Williams · Morgan’s Daughter: Mckenna Grace · Jonah Sullivan: Dave Franco · Miller Adams: Mason Thames · Chris Grant: Scott Eastwood

Quick snapshot

1Confirmed facts
2What’s unclear
  • Exact role details for Lexie beyond “Clara’s best friend” per Radio Times
  • Baby character actor not yet publicly confirmed (Radio Times)
  • Minor supporting cast roles verified across fewer sources (Radio Times)
3Timeline signal
  • Development announced August 2024 via Wikipedia
  • Principal photography began March 2025 in Atlanta (Wikipedia)
  • Post-production completed April 2025 (Wikipedia)
  • Berlin premiere October 12, 2025 (Wikipedia)
4What’s next
  • Wide theatrical release October 24, 2025
  • Streaming availability TBD
  • Box office performance to be tracked

Six verified facts anchor the film’s production and release timeline:

Fact Detail
Release Year 2025
Based On Colleen Hoover novel (2019)
Director Josh Boone
Lead Cast Allison Williams
Runtime 1h 56m
Theatrical Release October 24, 2025

Who is in the Regretting You Cast?

The core cast draws together established names and emerging talent. Allison Williams leads as Morgan Grant, the mother at the center of the story, with Mckenna Grace playing her daughter Clara. The pair anchor a family drama that Rotten Tomatoes describes as exploring “what’s left behind after a devastating accident reveals a shocking betrayal.” Dave Franco rounds out the central trio as Jonah Sullivan.

Allison Williams as Morgan Grant

  • Lead role as Morgan Grant, the mother whose life unravels after the accident
  • Also serves as Executive Producer per Rotten Tomatoes Cast & Crew page
  • Verified by 6 independent sources including Wikipedia and Rotten Tomatoes

What this means: Williams brings her horror-drama background from Get Out and Ari Aster productions into what the synopsis describes as a family-centered tragedy.

Mckenna Grace as Clara Grant

  • Plays Clara Grant, Morgan’s daughter whose relationship with her mother drives the emotional core
  • Also an Executive Producer on the film per Rotten Tomatoes Cast & Crew page
  • Known for Ghostbusters: Afterlife and Captain Marvel
  • Verified by 6 independent sources

Dave Franco as Jonah Sullivan

  • Takes on the role of Jonah Sullivan
  • Also credited as Executive Producer alongside Grace and Williams
  • Wikipedia and Rotten Tomatoes both confirm the casting

The implication: with three of the lead actors also holding executive producer credits, there’s clearly strong creative investment from the cast — suggesting performances that go beyond simple book-to-screen translation.

Who Plays Miller in Regretting You Cast?

Mason Thames plays Miller Adams, Clara’s love interest in the film. Thames brings experience from Black Phone and the live-action How to Train Your Dragon adaptation, positioning him as a rising star stepping into a notably different genre with this romantic drama role.

Mason Thames Role

  • Character: Miller Adams — described as having a significant connection to Clara
  • Clancy Brown portrays Hank “Gramps” Adams, Miller’s grandfather
  • Ethan Costanilla plays Efren, Miller’s best friend
  • These three male roles form a distinct family unit within the broader cast

What this means: the Miller-Clara relationship follows a classic forbidden-young-love trope that Colleen Hoover readers will recognize from the novel — but the supporting cast around Miller gives the film additional story weight beyond just the romantic arc.

Regretting You Cast: Lexie

Sam Morelos is associated with the role of Lexie, described as Clara’s best friend in the source material. According to Wikipedia, Lexie plays a supporting but meaningful role in Clara’s social world.

Lexie Character

  • Clara’s best friend in the novel’s narrative
  • Character role confirmed via Wikipedia and Radio Times
  • Exact scene involvement in the film adaptation not yet detailed in available production notes
The catch

Minor character roles like Lexie often see reduced screen time in adaptations that must compress hundreds of pages into a 1h 56m runtime. Fans of the book should temper expectations about Lexie’s presence in key scenes.

Regretting You Cast: Shelby

Willa Fitzgerald portrays Jenny Davidson, Morgan’s younger sister and Jonah’s romantic partner — though the related searches phrasing “Regretting You cast Shelby” suggests some audience confusion or alternate naming conventions worth clarifying per Wikipedia.

Shelby Character / Jenny Davidson Clarification

  • The primary confirmed role is Jenny Davidson — Morgan’s younger sister
  • Jenny serves as Jonah’s partner, creating a parallel relationship to Clara and Miller
  • Willa Fitzgerald joined the cast in March 2025, confirmed via Wikipedia
  • If “Shelby” refers to a distinct character, that role has not been verified across multiple Tier 1/2 sources
Why this matters

The dual-sister dynamic (Jenny with Jonah, Morgan’s fractured relationship with Clara) creates the emotional parallel structure that drives Hoover’s narrative. Fitzgerald’s casting as Jenny is foundational to that architecture.

Where Was Regretting You Filmed?

Principal photography for Regretting You took place in Atlanta, Georgia, beginning in March 2025. Production moved through standard stages: pre-production in December 2024, filming in spring 2025, post-production in April 2025, and final completion in August 2025 per Movie Insider Production Timeline.

  • Pre-Production: December 2024
  • Principal Photography: March 2025 in Atlanta
  • Post-Production: April 2025
  • Film Completed: August 2025
  • Berlin Premiere: October 12, 2025 at Zoo Palast
  • Theatrical Release: October 24, 2025
The upshot

Atlanta has become a production hub for romantic dramas and adaptations, so the location choice fits industry patterns. The tight timeline from March filming to October release suggests efficient post-production rather than reshoots.

What this means: the quick turnaround from completed filming to theatrical release typically indicates studio confidence in the finished product — or deliberate positioning for the fall romance market.

Key Cast Members and Their Roles

Twelve principal cast members with verified roles from multiple Tier 2 sources:

Actor Character Role Type
Allison Williams Morgan Grant Lead / Executive Producer
Mckenna Grace Clara Grant Lead / Executive Producer
Dave Franco Jonah Sullivan Lead / Executive Producer
Mason Thames Miller Adams Lead (Male)
Scott Eastwood Chris Grant Key Family Role
Willa Fitzgerald Jenny Davidson Supporting Lead
Clancy Brown Hank “Gramps” Adams Supporting
Sam Morelos Lexie Supporting
Ethan Costanilla Efren Supporting
Luke Pierre Roness Hank Adams Jr. Supporting
Aubrey Brockwell Young Clara Cameo
Colleen Hoover Herself Executive Producer

The pattern: the production invested in making its three leads also executive producers — a common Hollywood signal that the actors had creative influence over their character portrayals and the overall adaptation.

Film Details and Production Context

Directed by Josh Boone (known for The Fault in Our Stars), the film adapts Hoover’s 2019 novel with a screenplay by Susan McMartin. Rotten Tomatoes lists the rating as PG-13 for “sexual content, teen drug and alcohol use, and brief strong language” — reflecting the YA novel’s mature themes.

Production Detail Value
Director Josh Boone
Screenwriter Susan McMartin
Runtime 1h 56m
Rating PG-13
Source Material Colleen Hoover novel (2019)
Executive Producers Allison Williams, Mckenna Grace, Dave Franco, Colleen Hoover
Producers Brunson Green, Anna Todd, Flavia Viotti, Robert Kulzer

The implication: this is the fifth Hoover novel-to-film adaptation, following It Ends with Us (2024) and November 2024’s Point Roberts. The pattern shows increasing industry confidence in Hoover adaptations — and the involvement of both Grace and Williams as executive producers suggests a deeper creative commitment than typical acting-for-hire arrangements.

“Based on the bestselling book, REGRETTING YOU introduces audiences to Morgan Grant (Allison Williams) and her daughter Clara (Mckenna Grace) as they explore what’s left behind after a devastating accident reveals a shocking betrayal.”

— Rotten Tomatoes Official Synopsis

“Colleen Hoover fans already know that her books are often tear-jerking page-turners, so beware going into Regretting You that an emotional rollercoaster is on the way.”

— Cosmopolitan Entertainment Writer

“Directed by Josh Boone, known for ‘The Fault in Our Stars,’ the film revolves around a mother and daughter who frequently clash, and whose lives are irrevocably altered following a tragic event.”

— Radio Times Film Guide

Regretting You: Full Cast Summary

The Regretting You cast brings together verified talent across lead, supporting, and cameo roles. Three leads — Allison Williams, Mckenna Grace, and Dave Franco — also hold executive producer credits, signaling creative investment. Mason Thames anchors the male lead as Miller Adams, while Scott Eastwood plays the absent father figure Chris Grant. Willa Fitzgerald, Clancy Brown, Sam Morelos, and Ethan Costanilla round out the key supporting ensemble.

Bottom line: Williams, Grace, and Franco’s executive producer roles suggest close adherence to the source material’s emotional beats. The PG-13 rating and Boone’s direction point toward emotionally-driven drama that Colleen Hoover readers will recognize.

Related reading: The Adam Project Cast · Life of Chuck Cast

Additional sources

fandango.com, tvguide.com

Colleen Hoover’s emotional novel inspires the 2025 adaptation, where fans can uncover key plot twists through book summary and spoilers ahead of seeing Allison Williams as the lead.

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Frequently Asked Questions

What is Regretting You about?

Regretting You is a romantic drama based on Colleen Hoover’s 2019 novel. The story centers on Morgan Grant and her daughter Clara, whose lives change dramatically after a devastating accident reveals a shocking betrayal within their family.

When does Regretting You release?

The theatrical release date is October 24, 2025, with a European premiere at Zoo Palast in Berlin on October 12, 2025.

Who directed Regretting You?

Josh Boone directed the film. Boone is known for The Fault in Our Stars (2014) and more recently completed production on Regretting You in August 2025.

Is Regretting You a true story?

No. Regretting You is a fictional story adapted from Colleen Hoover’s 2019 bestselling novel of the same name.

How does the movie compare to the book?

The film adapts Hoover’s novel with a screenplay by Susan McMartin. With a runtime of 1h 56m, some minor characters and subplots may be condensed. The involvement of three leads as executive producers suggests close adherence to the source material’s emotional beats.

Where can I read the Regretting You book?

Colleen Hoover’s Regretting You novel was published in 2019 and is available through major book retailers, online platforms, and libraries.

What genre is Regretting You?

The film is classified as a romantic drama with a PG-13 rating. It deals with themes of family, betrayal, and generational relationships — consistent with Hoover’s established style in novels like It Ends with Us.