Twinless (2025): Full list of cast and characters explored

Twinless (2025) is an American black comedy psychological drama film, written and directed by James Sweeney. It was released at the 2025 Sundance Film Festival on January 23, 2025, under the US Dramatic Competition category, where it won the Audience Award.

The movie will be released in theatres on September 5, 2025, by Lionsgate and Roadside Attractions. Twinless is about two men who form an unlikely friendship after they meet at a twinless twin support group. The story combines dark humor with emotional depth and psychological awareness, featuring an ensemble cast.

Twinless: Cast and characters list

Below is the full cast and character list of Twinless:

`1) Dylan O'Brien as Roman / Rocky

A still from the movie (Image via YouTube/ Lionsgate Movies)

Dylan O'Brien stars as twin brothers Roman and Rocky, delivering a dual performance that emphasizes the difference in their personalities. Roman is quiet and emotionally sensitive and struggles with the trauma of having lost his twin, whereas Rocky is outgoing, impulsive, and charismatic. O'Brien's performance brings both individuality and an underlying emotional bond between the twins.

Other performances of Dylan O'Brien include The Maze Runner franchise, Love and Monsters, and American Assassin.

2) James Sweeney as Dennis

James Sweeney, the director and writer of the film, plays Dennis, a quirky and compassionate man who befriends Roman. Dennis's humor and unorthodox ways of grieving add warmth to the narrative.

Other works of James Sweeney include The Big Door Prize (TV series) and The Nowhere Inn.

3) Aisling Franciosi as Marcie

Aisling Franciosi portrays Marcie, a lady who develops an intimate and emotional relationship with Dennis. Her character brings balance to Dennis's unusual nature while emphasizing themes of intimacy and self-improvement.

Other works of Aisling Franciosi include The Nightingale, Hanna (TV series), and Mare of Easttown.

4) Lauren Graham as Lisa

Lauren Graham portrays Lisa Barinholtz, the mother of Rocky and Roman. She beautifully embodies a parent's lasting love and loss, having lost a child, providing emotional resonance and gravitas to the narrative.

Some of her known works include Gilmore Girls, Parenthood, and The Mighty Ducks franchise.

5) Tasha Smith as Charlotte

Tasha Smith plays Charlotte, a therapist at the twinless support group, who helps the characters navigate their emotions, stressing the importance of mental health and strength.

Other works of Tasha Smith include Why Did I Get Married?, Deadpool 2, and The Oath.

6) Chris Perfetti as George

Chris Perfetti plays George, Dennis’s longtime friend who provides both comic relief and grounding advice, helping the viewers to relate to the story’s emotional beats.

Other works of Chris Perfetti include Abbott Elementary, You’re the Worst, and The Unicorn.

7) François Arnaud as Sammy

François Arnaud portrays Sammy, a mysterious and intriguing character whose interactions with the main duo add tension and complexity to the plot.

Some of François Arnaud's other works include The Borgias, Crossbones, and The Art of More.

8) Susan Park as Sage

Susan Park (Image via Instagram/@itscree)

Susan Park stars as Sage, a support group member whose own life experiences mirror the protagonists' issues, providing depth and insight to the story.

Some of Susan Park's other work includes The Resident (TV series) and Supergirl (TV series).

Twinless combines comedy, psychological drama, and emotional storytelling, providing a moving exploration of loss, identity, and human connection.

Also read: Where was Winter Spring Summer or Fall filmed? Complete guide to all filming locations and other production details.

About the author

Ankur Pandey covers all things pop culture and entertainment at Sportskeeda. He holds a Postgraduate Diploma in Mass Communication from St. Xavier's College in Mumbai, which has equipped him with exceptional storytelling, and communication skills. With over a year of experience as a news anchor & producer at ITV Network, Ankur has interviewed notable Indian celebrities including, Anu Malik and Shalin Bhanot. His insightful coverage of environmental issues also earned him further recognition.

His fascination with media trends and their profound impact on society ignited his passion for working in the dynamic entertainment industry while ensuring ethical reporting through thorough research. On a personal level, Ankur admires the versatility and environmental advocacy of Leonardo DiCaprio, and would choose to experience The Lord of the Rings trilogy for its monumental cinematic journey.

In his free time, Ankur enjoys reading to gain new perspectives and traveling to immerse himself in diverse cultures, all while keeping an active lifestyle.

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Edited by Ankur Pandey