Dermot Mulroney Hypes Comedy-Thriller ‘Killing Mary Sue’

A Social Media Shout-out

Actor Dermot Mulroney took to Instagram on June 12 to spotlight the upcoming dark comedy thriller Killing Mary Sue. In a post shared with his 250,000 followers, he wrote, “You’ve gotta see this lethally hilarious kill her thriller KILLING MARY SUE @killingmarysuemovie – Out 6/13 (tomorrow!) shout out to incredible cast w/ star 💫 @sierramccormick @thejakebusey @french_stewart @katiekillackytoomey @jessekove #martykove thx to w/d @jamesksunshine & producers.” The carousel of promotional stills showcases Sierra McCormick, Jake Busey, French Stewart, Katie Killacky Toomey and Jesse Kove before a stylized backdrop hinting at blood-spattered humor and suspense.

Directed and co-written by James K. Sunshine, the film follows McCormick’s resourceful Mary Sue as she lures a circle of acquaintances to a remote cabin under false pretenses—only to flip the script and deliver her own brand of justice. Early festival buzz calls it “a cheeky riff on classic slasher plots,” with critics praising Sunshine’s brisk pacing and the cast’s commitment to absurdity.

Mulroney’s Social Feed Spans Film, Tv And Fashion

Mulroney’s shout-out arrives amid a busy stretch on his social channels. Just weeks earlier, he posted heartfelt reflections after wrapping Season 13 of NBC’s Chicago Fire, writing, “I hope these pictures can even begin to show how much love and gratitude I feel finishing CHICAGO FIRE … Thanks to writers and execs @nbconechicago for coming up with #chiefpascal #dominicpascal at #firehouse51 – he has been an honor to portray.” That was sandwiched between sleek photo shoots—most recently a minimalist spread for L’Officiel Fashion Book Australia shot by Mike Ruiz—demonstrating his flair for both gritty drama and runway-ready style.

Despite a resume spanning rom-com classics like My Best Friend’s Wedding to franchise installments such as Scream VI and Marvel’s Secret Invasion, Mulroney has embraced social media as a platform to celebrate peers and emerging filmmakers. By endorsing Killing Mary Sue, he shines a spotlight on an indie cast and crew poised to make a splash amid summer blockbusters.

Advance ticket platforms report near-sellouts in key markets, and Quiver Distribution’s marketing push has leveraged Mulroney’s post to drive awareness beyond the horror-comedy niche. With genre fans weighing options between tentpole releases and smaller fare, Mulroney’s seal of approval could tip the balance.

Veteran actor Jake Busey delivers a scene-stealing turn as one of Mary Sue’s unsuspecting targets, while French Stewart adds off-kilter comic relief. Katie Killacky Toomey and Jesse Kove round out the ensemble, each bringing depth to roles steeped in ulterior motives. #martykove, as Kove is tagged online, has already teased behind-the-scenes chaos in his own Instagram stories, hinting at practical stunts and elaborate prosthetics.

For director James K. Sunshine, best known for indie comedies, Killing Mary Sue marks a tonal shift. He recently told Fangoria that balancing genuine scares with broad satire was “like tightrope walking—one wrong step and you plunge into cliché or farce.” His creative team, thanked explicitly by Mulroney in the Instagram caption, includes costume designer Ava Chen and cinematographer Laura Stanwyck, whose moody lighting elevates the film’s dark humor.

Mulroney’s endorsement underscores a growing trend: established stars using personal platforms to champion independent projects they believe in. His followers, accustomed to seeing him in prestige TV and fashion editorials, now get a peek at his support for bold storytelling on the fringes.

With its mix of suspense, sharp dialogue and gleeful gore, Killing Mary Sue opens June 13 in select theaters and on demand. Audiences can decide tomorrow whether Mary Sue’s elaborate revenge scheme lives up to the hype—and whether Mulroney’s enthusiastic recommendation was on point.

Mulroney’s timely post may well elevate this off-beat dark tale into summer must-see territory for fans craving something a little… lethal.

Trivia

Dermot Mulroney was married to actress Catherine Keener from 1990 until their divorce in 2007, and they have a son together.

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Poulami Nag

 

Poulami is an associate editor. She did her MA in English from Miranda House, University of Delhi and has qualified UGC-NET. She also holds a PG diploma in Editing and Publishing from Jadavpur University. Her journey as a content writer began in 2017 and since then, Poulami has garnered diverse interests along the way.

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