The Companion cast features Sophie Thatcher, Jack Quaid and Lukas Gage. This info article contains minor spoilers and character details for Drew Hancock’s 2025 movie on HBO Max. Check out more cast guides in Vague Visages’ Know the Cast category.

Companion explores the relationship between an insecure man and an AI robot. When Iris travels to a remote country home with her boyfriend, she learns the truth about her existence after murdering a Russian businessman in self-defense. The narrative follows the main protagonist as she manipulates her operating system and fights for her life. Here’s every actor and character in Companion.

Read More at VV — Know the Cast: ‘Heretic’

Companion Cast: Sophie Thatcher as Iris

Character Profile: A companion robot. She learns about a murder conspiracy and her true existence during a trip with boyfriend. Iris changes her intelligence level to 100 while plotting an escape.

Thatcher’s Resume: Young Regan in The Exorcist (2016), Jeanine in The Tomorrow Man (2019), Becky Monroe in When the Streetlights Go On (2020), Natalie in Yellowjackets (2021-), Sister Barnes in Heretic (2024)

Read More at VV — Know the Cast: ‘The Brutalist’

Companion Cast: Jack Quaid as Josh

Character Profile: Iris’ boyfriend. He is an insecure man who struggles with abandonment issues. Josh organizes a murder plot involving Iris and a Russian businessman.

Quaid’s Resume: Marvel in The Hunger Games Movie Franchise (2012-13), Clark Morelle in Vinyl (2016), Fish Bang in Logan Lucky (2017), Hughie Campbell in The Boys (2019-), Richie Kirsch in Scream (2022)

Read More at VV — Know the Cast: ‘A Different Man’

Companion Cast: Lukas Gage as Patrick

Character Profile: The partner of Josh’s friend. He is a mild-mannered gay man who slowly realizes that he’s a companion robot. Patrick’s programming gets manipulated by Josh.

Gage’s Resume: Brandon Galloway in American Vandal (2017), Eric in Assassination Nation (2018), Tyler in Euphoria (2019), Dillon in The White Lotus (2021), Lewis in Smile 2 (2024)

Read More at VV — Know the Cast: ‘MaXXXine’

Companion Cast: Megan Suri as Kat

Character Profile: Josh’s friend. She dates a Russian businessman and makes disparaging remarks about Iris. Kat colludes with Josh in a murder conspiracy.

Suri’s Resume: Rani in Valentine’s Day (2010), Quinn in Atypical (2018-19), Simryn in Fresh Off the Boat (2020), Aneesa in Never Have I Ever (2021-23), Camille in The Kiss List (2023)

Read More at VV — Know the Cast: ‘Civil War’

Companion Cast: Harvey Guillén as Eli

Character Profile: Patrick’s partner. He is a charismatic gay man who carries on a relationship with a companion robot. Eli colludes with Josh and Kat.

Guillén’s Resume: Zach in The Internship (2013), Guillermo De La Cruz in What We Do in the Shadows (2019-24), Joaquim Wolfson in Werewolves Within (2021), Perrito in Puss in Boots: The Last Wish (2022), Gabo in Wish (2023)

Read More at VV — Know the Cast: ‘I Saw the TV Glow’

Companion Cast: Rupert Friend as Sergey

Character Profile: A Russian businessman. He is property owner and sod farmer who uses Kat as an “accessory.” Sergey gets murdered by Iris.

Friend’s Resume: Mr. Wickham in Pride & Prejudice (2005), Peter Quinn in Homeland (2012-17), Agent 47 in Hitman: Agent 47 (2015), James Whitehouse in Anatomy of a Scandal (2022), Guru Bob in High Desert (2023)

Read More at VV — Know the Cast: ‘The Iron Claw’

The Companion cast also includes:

• Jaboukie Young-White as Teddy
• Matt McCarthy as Sid
• Marc Menchaca as Deputy Hendrix
• Woody Fu as Mateo
• Ashley Lambert as Josh’s Car (Voice)

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.