Mark O'Brien

Mark O'Brien Profile Photo

Characters played by Mark O'Brien

Alex Le Domas — Ready or Not (2019)

Estranged heir, groom on wedding day, caught in deadly game

Rob Meadows — The Darkest Minds (2018)

A member of the Children's League who assists Ruby in escaping the camp. Ruby uses her powers on him but grows suspicious of his true intentions, prompting her to flee the League with Suzume.

Ace — Blue Bayou (2021)

A NOPD officer and the absent biological father of Jessie. Initially involved in harassing Antonio, he later develops a conscience after witnessing Denny’s brutality. He helps bring Denny to justice, informs Kathy of the assault, and makes amends with Jessie by visiting her at the airport before her departure.

Jeremiah — How It Ends (2018)

A neighbor living with Sam at the cabin. His paranoia and obsession with Sam turn violent, leading to a fatal confrontation with Will in self-defense.

Josh — Parallel (2018)

One of the four software developer friends who discovers a mirror portal. Uses it to seduce women in parallel worlds, eventually getting killed by Carmen's boyfriend. Later replaced by an alternate version who struggles with reality discrepancies.

Will — Grown Up Movie Star (2010)

Newly arrived American student who becomes involved in Ruby's journey of sexual and personal exploration. Serves as a catalyst for the teenager's coming-of-age experiences and contributes to the intricate web of relationships in the narrative.

Aaron Smith — The Righteous (2021)

A mysterious young man who arrives at Frederic and Ethel's isolated home claiming a sprained foot. He reveals that he is Frederic's biological son and confesses that he caused Joanie's death while possessed by an inexplicable force. He repeatedly demands that Frederic kill him, murders Doris, attacks Ethel, and is ultimately killed by Frederic.

Chris Davis — Hammer (2019)

Chris is Stephen's estranged son, whose decisions drive the unfolding crisis. He says a woman was shot while riding with him and that he hid her near the Myers farm instead of calling for help. Needing money for Samson and trying to locate Jeremy, Chris joins his family in confronting the shop owner, then offers to lead the men demanding the bags to them.

Jason — End of Days, Inc. (2015)

Jason is a Godfrey Global Inventory employee who notices that a damaged punchcard from Australia may correspond to a reported death, leading him to suspect the company is linked to supernatural disasters. He helps Janet and the others hide Misty's body, investigates the strange events, and even offers to serve Mr. Godfrey to survive.

Career Overview

Mark O'Brien has 79 screen credits in a career dating back to 2008. Their work is anchored in the Ready or Not Collection universe with 1 titles. Signature works include Arrival, Ready or Not, The Copenhagen Test. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.

Personal Facts

Known For
Acting
Gender
male
Known Credits
79
Birth Date
1984-05-07
Birth Place
St. Johns, Newfoundland, Canada

Known For

Associated Universes

Frequent Collaborators

Credits

Content sources

Related entry on Wikidata (Q15867224), public domain (CC0).