Companion cast and character guide: Who plays whom in Drew Hancock's sci-fi horror dark comedy?

Companion is a sci-fi thriller that brings Sophie Thatcher back in her scream queen avatar. The film was released in US theaters on January 31, 2025, and is now available to watch online. It follows a couple spending their weekend at a friend's isolated lakehouse.

Its official synopsis, per IMDb, currently reads:

"A weekend getaway with friends at a remote cabin turns into chaos after it's revealed that one of the guests is not what they seem."

Companion marks writer-director Drew Hancock's feature-film directorial debut. He has previously worked in the writing teams of shows like Suburgatory, Mr. Pickles, My Dead Ex, and Blue Mountain State. The film is produced by Zach Cregger, Roy Lee, Raphael Margules, and J. D. Lifshitz, who also backed Cregger's 2022 horror film, Barbarian.

Sophie Thatcher and Jack Quaid star in the film's central roles of Iris and Josh, respectively. Megan Suri, Harvey Guillén, and Lukas Gage star in key supporting roles.

Companion: Full list of main cast and characters explored

Companion follows Iris and Josh, a young couple who go on a weekend getaway with their friends at a lavish, isolated house. Things soon take a dark turn as they start showing their true colors. The film, written and directed by Drew Hancock, combines the genre elements of dark comedy and horror-thriller in its sci-fi narrative, full of twists and turns. It is now available to rent on digital platforms.

1) Sophie Thatcher as Iris

Sophie Thatcher as Iris (Image via YouTube/@WarnerBrosPictures)

Companion presents Sophie Thatcher as Iris, a young woman who learns some crucial details about herself while on a getaway trip with her boyfriend. She plays a critical role in the film's unpredictable narrative as she seeks revenge against those who wronged her.

This is not the first time Thatcher has worked on a similarly terrifying project. She has been a part of Showtime's acclaimed show, Yellowjackets. Most recently, she starred in Hugh Grant-led Heretic, Mia Goth-led MaXXXine, and led Rob Savage's The Boogeyman.

2) Jack Quaid as Josh

Jack Quaid as Josh (Image via YouTube/@WarnerBrosPictures)

Jack Quaid stars as Josh, a young man who takes his new girlfriend on a getaway at a remote lakeside estate. Josh initially appears to be a kind and charming man, until he sheds that mask to reveal his true self. His unhinged performance builds the dramatic tension in the film.

Quaid is the son of actor Dennis Quaid (The Substance) and actress Meg Ryan (When Harry Met Sally). He is widely known for his role as Hughie Campbell, a vigilante from Amazon Prime Video's The Boys. After starring in Plus One (2019), Oppenheimer (2023), and Scream (2022), he is set to return with his new role in an action thriller titled Novocaine.

3) Megan Suri as Kat

Megan Suri as Kat (Image via YouTube/@WarnerBrosPictures)

Megan Suri plays Kat, one of Josh's friends, who's in a relationship with the owner of the lakeside house they visit. Much like Josh, Kat has an ulterior motive behind this trip. Before Companion, Suri starred in the Netflix coming-of-age series Never Have I Ever. She has also worked on a variety of projects, such as It Lives Inside (2023), The Kiss List (2023), and The MisEducation of Bindu (2019).

4) Harvey Guillén as Eli

Harvey Guillén as Eli (Image via YouTube/@WarnerBrosPictures)

Companion casts Harvey Guillén as Josh's friend, Eli, who tags along with his partner, Patrick. Guillén is a Mexican-American actor, best known for his role as human familiar Guillermo de la Cruz in Hulu's vampire comedy series, What We Do in the Shadows.

5) Lukas Gage as Patrick

Lukas Gage as Patrick (Image via YouTube/@WarnerBrosPictures)

Lukas Gage plays Eli's partner, Patrick, who accepts his true identity, similar to Iris. Gage has previously starred in shows like HBO's The White Lotus, FX's Fargo, and Netflix's You. He has worked alongside Jake Gyllenhall in Road House (2024) and Naomi Scott in Smile 2 (2024).