Mark O'Brien

Personal Info

Known For

Acting

Known Credits

1.0884

Gender

Male

Birthday

07-May-1984

Age

(42 years old)

Place of Birth

St. Johns, Newfoundland, Canada

Also Known As
  • Mark O’Brien

Mark O'Brien

Biography

Mark O'Brien (born May 7th, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle (2010) and Tom Rendon in Halt and Catch Fire (2014).


Credits

Cut from the Same Cloth Cut from the Same Cloth (2009) Character: Jack Cochrane
In discovering the secret past of an old St. John's neighborhood, a family learns that love can lead down an uncharted road that is best followed with the heart.
Epilogue Epilogue (2008) Character: Henry
The morning after a drunken romp, Henry and Evelyn reveal that they have shared more than just a simple night.
Brad Brad (2010) Character: Brad
A day in the life of a young man starting a career in in-office motivational speaking.
Quiet at Dawn Quiet at Dawn (2009) Character: Watts
A WW1 soldier has to watch over another soldier whom he falsely accused of desertion and whom will executed at dawn for cowardice.
Wanderer Wanderer (2016) Character: Eric
A conversation over dinner, between a married couple and a weary traveller, leads to unexpected revelations
Sweetieface Sweetieface (2013) Character: Sam
Sam and Grace meet up in a deserted bar, seeing each other for the first time in long while. They have a lot to say, except their true feelings for one another.
Falsehood Falsehood (2025) Character: Elizeus Carrier
In a dystopian future where all of humanity's memories have become government-regulated transactional products, mankind's crown-jewel memory is stolen - the answer to where we come from.
The Four Horsemen The Four Horsemen (2008) Character: Eric Rollins
Four high school football stars enlist in the Marines and head off to fight in the war in Iraq. When one of them is killed and another wounded, they return home only to find is extremely difficult to pick up the threads of their old lives. The memories of events in Iraq combined with the lack of public support pushes many of these men to the breaking point.
Dennis Dennis (2015) Character: Dennis
Dennis Smarten leads a simple life. He has a job in a plastic bag factory, an apartment in his sister's basement and a predisposition for psychosis.
How It Ends How It Ends (2018) Character: Jeremiah
A desperate father tries to return home to his pregnant wife after a mysterious apocalyptic event turns everything to chaos.
The Darkest Minds The Darkest Minds (2018) Character: Rob Meadows
After a disease kills 98% of America's children, the surviving 2% develop superpowers and are placed in internment camps. A 16-year-old girl escapes her camp and joins a group of other teens on the run from the government.
End of Days, Inc. End of Days, Inc. (2015) Character: Jason
A group of laid-off workers bribed into working one last night discover that processing the last of their "inventory" will lead to cataclysmic consequences.
Goalie Goalie (2019) Character: Terry Sawchuk
The life of a professional hockey player was not always a glamorous one. For legendary goaltender Terry Sawchuk, each save means one more gash to his unmasked face and one more drink to numb the pain. Sawchuk traveled across the country racking up 103 shutouts and 400 stitches to his face, proving that this is a man who lives, breathes, and dies a goalie.
Bad Times at the El Royale Bad Times at the El Royale (2018) Character: Larsen Rogers
Lake Tahoe, 1969. Seven strangers, each one with a secret to bury, meet at El Royale, a decadent motel with a dark past. In the course of a fateful night, everyone will have one last shot at redemption.
Kin Kin (2018) Character: Jake
A young boy finds a powerful otherworldly weapon, which he uses to save his older adoptive brother from a crew of thugs. Before long, the two of them are also pursued by federal agents and mysterious mercenaries aiming to reclaim their asset.
The Dark Stranger The Dark Stranger (2016) Character: Mark
Haunted by a terrifying spirit out of her graphic novel, a young artist struggles to overcome her psychosis before it destroys her.
Nuremberg Nuremberg (2025) Character: Colonel John Amen
In postwar Germany, an American psychiatrist must determine whether Nazi prisoners are fit to go on trial for war crimes, and finds himself in a complex battle of intellect and ethics with Hermann Göring, Hitler's right-hand man.
Hammer Hammer (2019) Character: Chris Davis
A father faces a personal crisis when he discovers his estranged son fleeing a botched drug deal. The two men embark on a violent odyssey that grapples with themes of fatherhood, family and fate.
Heartless Disappearance Into Labrador Seas Heartless Disappearance Into Labrador Seas (2008) Character: Charlie
When a marriage is threatened by a long excursion for work, domestic trouble is buffeted by family and friends.
Beat Down Beat Down (2012) Character: Michael
Beat Down is an irreverent comedy about wrestling, family and following your dreams no matter how painful that can sometimes be. Fran Whiteway (Marthe Bernard, Republic of Doyle) is eighteen and a real firecracker. More than anything, Fran dreams of becoming a professional wrestler. Her single-father Whitey (Robb Wells, Trailer Park Boys) is a former-pro, aka White Lightning, with broken dreams of his own and is dead set against Fran wrestling. Fran is determined though and when Whitey's old rival Dark Thunder (Tony Nappo, Saw II) comes to town, she runs away to join his tour. Whitey is devastated and while he tries to get his daughter back, Fran learns the ropes of the wrestling game and of life itself.
How to Plan an Orgy in a Small Town How to Plan an Orgy in a Small Town (2015) Character: Bruce Buck
In high school Cassie Cranston was slut-shamed out of the wholesome and repressed town of Beaver’s Ridge following a humiliating attempt at losing her virginity. Now, years later, a big city sex columnist, Cassie returns home to bury her mother and finds a chance for revenge when her prudish childhood nemesis insists she helps her old friends plan an orgy.
The Front Runner The Front Runner (2018) Character: Billy Shore
Gary Hart, former Senator of Colorado, becomes the front-runner for the Democratic presidential nomination in 1987. Hart's intelligence, charisma and idealism makes him popular with young voters, leaving him with a seemingly clear path to the White House. All that comes crashing down when allegations of an extramarital affair surface in the media, forcing the candidate to address a scandal that threatens to derail his campaign and personal life.
Seven Veils Seven Veils (2025) Character: Paul
Jeanine, an earnest theatre director, has been given the task of remounting her former mentor’s most famous work, the opera Salome. Haunted by dark and disturbing memories from her past, she allows her repressed trauma to color the present as she re-enters the opera world after so many years away.
State Like Sleep State Like Sleep (2019) Character: Darren
Following the death of her husband, Katherine travels to Brussels, where a few loose ends become a whole web of secrets as she untangles her late spouse’s mysterious last days alive.
Shadow of God Shadow of God (2025) Character: Mason Harper
While performing an unauthorized exorcism on his father, an elite exorcist suspects the entity he's doing battle with might be a holy being – perhaps even God.
Ready or Not Ready or Not (2019) Character: Alex Le Domas
A young bride's wedding night turns into her worst nightmare when her ridiculously rich in-laws force her to play a gruesome game of hide-and-seek.
The One That Got Away The One That Got Away (2008) Character: Tommy Palchek
Joanna, recently divorced, decided to return with her daughter to the town where she was born. There, she confronts the memories of the past when he meets his former lover, now married.
Grown Up Movie Star Grown Up Movie Star (2010) Character: Will
The story of Ruby, 13, determined to grow up fast after her mother runs away to become a movie star, leaving Ruby with her hopelessly rural father.
Arrival Arrival (2016) Character: Captain Marks
Taking place after alien crafts land around the world, an expert linguist is recruited by the military to determine whether they come in peace or are a threat.
Topper Topper (2025) Character: Topper
Once a top rising comedian, Topper quickly falls from grace and finds himself struggling to get by in the cutthroat comedy scene of LA. His inability to face and accept his childhood has kept him from progressing. After an unexpected visit from a ghost of his past, Topper must return to Detroit to face his past and come to terms with his demons, before his dream and possibly himself dies off.
Mum's the Word Mum's the Word (2009) Character: Curtis
A group of youngsters discover that Mr. Templeton has 40 grand hidden in his home. They figure they can get their hands on the cash by masking themselves as Newfoundland Mummers.
Parallel Parallel (2018) Character: Josh
A group of friends stumble upon a mirror that serves as a portal to a "multiverse", but soon discover that importing knowledge from the other side in order to better their lives brings increasingly dangerous consequences.
Anon Anon (2018) Character: Cyrus Frear
Set in a near-future world where there is no privacy, ignorance or anonymity, our private memories are recorded and crime almost ceases to exist. In trying to solve a series of unsolved murders, Sal Frieland stumbles onto a young woman who appears to have subverted the system and disappeared. She has no identity, no history and no record. Sal realizes it may not be the end of crime but the beginning. Known only as 'The Girl', Sal must find her before he becomes the next victim.
Marriage Story Marriage Story (2019) Character: Carter Mitchum
A stage director and an actress struggle through a grueling, coast-to-coast divorce that pushes them to their personal extremes.
Blue Bayou Blue Bayou (2021) Character: Ace
As a Korean-American man raised in the Louisiana bayou works hard to make a life for his family, he must confront the ghosts of his past as he discovers that he could be deported from the only country he has ever called home.
Snarbuckled Snarbuckled (2010) Character: Jacob O'Higgins
An itinerant cook survives a shipwreck, paddles himself to an island in a stock pot, and finds himself on a surreal journey through his past to discover the ineffable connection he has with a clown living a desultory existence in a dilapidated lighthouse.
The Righteous The Righteous (2021) Character: Aaron Smith
A burdened man feels the wrath of a vengeful God after he and his wife are visited by a mysterious stranger.



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