Shark Tank’s “Mr. Wonderful” Kevin O’Leary is used to being the most feared person in the room, but on the set of Marty Supreme, he learned the hard way that film sets are not democracies. The billionaire investor, who has spent decades cutting down entrepreneurs on national television, found himself on the receiving end of director Josh Safdie’s uncompromising vision. O’Leary’s portrayal of ruthless millionaire Milton Rockwell in the A24 sports comedy-drama has become one of the year’s most talked-about performances, but getting there required the businessman to surrender control in ways he never had before.
From Boardroom to Soundstage: O’Leary’s Cinematic Awakening
O’Leary’s transition from television’s toughest investor to supporting actor in a Josh Safdie film was never going to be smooth. The Shark Tank star, who has famously invested an estimated $8.5 million in about 40 companies since the show’s 2009 debut, initially approached filmmaking with the same authoritative mindset that has made him a household name. “I learned my lesson that film sets are not democracies,” O’Leary told Variety. “I’m not used to being told what to do. I do the telling”. This collision of egos reached its peak during one particularly grueling shoot that required 40 takes and lasted until 4 a.m., culminating in O’Leary literally smacking Oscar-nominated Timothée Chalamet on the bare buttocks with a real ping pong paddle to bring authenticity to a pivotal scene.
Despite the power struggles, Safdie and co-writer Ronald Bronstein recognized the goldmine of having a genuine capitalist tycoon embody their fictional villain. They eagerly incorporated O’Leary’s suggestions to make Rockwell even more cutthroat, including a memorable monologue where the character claims to be a “vampire” born in 1601—a bizarre detail that O’Leary felt captured the immorality of extreme wealth. The businessman-turned-actor also took unprecedented control over his character’s physical presentation, refusing to wear prop watches and instead going on a global hunt for era-appropriate timepieces. He secured a Patek Philippe from the 1950s from Rolex “at a crazy price” and somehow obtained a rare 1952 Seiko “Super” watch that may have come from a museum.
Creative Differences: The Battle Over Marty Supreme’s Ending
O’Leary’s business instincts inevitably clashed with Safdie’s artistic vision, particularly regarding the film’s conclusion. The investor found his character’s downfall “absurd” and fought repeatedly with the filmmakers over what he saw as an unrealistic resolution. “I had lots of fights with Ronnie [Bronstein]—well, not fights, but I said, ‘Guys, this Marty Supreme guy, I would never let anybody [expletive] me over like this. This would never happen to me, ever. And he is not paying an adequate price,’” O’Leary told the New York Times.
In a move that would surprise no who knows his Shark Tank persona, O’Leary proposed a darker ending: Chalamet’s character’s love interest, Rachel Mizler (played by Odessa A’zion), should die in childbirth to add more suffering to what he dismissed as a “kumbaya” conclusion. Safdie reportedly considered the change but ultimately rejected it as too “sick” . This creative tension speaks volumes about O’Leary’s commitment to portraying capitalism at its most unforgiving—even if his real-life instincts toward ruthless deal-making made him resistant to seeing his fictional counterpart defeated.
Awards Campaign and Critical Recognition
Despite the on-set conflicts, O’Leary’s performance has generated serious awards buzz, with A24 reportedly mounting a campaign for Best Supporting Actor reddit . The thought of Kevin O’Leary at actor roundtables alongside seasoned thespians is almost as surreal as his performance itself, but early reviews suggest his portrayal of Milton Rockwell captures something essential about American capitalism. Vanity Fair noted that O’Leary was “proud to play a ‘real asshole’” in the film, embracing the darker aspects of his public persona to create a villain who feels both larger-than-life and disturbingly authentic vanityfair .
The irony of O’Leary’s cinematic debut is not lost on observers: the same ruthless deal-making instincts that made him a television star made him initially resist the collaborative nature of filmmaking, yet those very instincts also helped him create one of the year’s most memorable antagonists. As Marty Supreme continues its awards season run, O’Leary finds himself in the unfamiliar position of being judged rather than judging—a role reversal that even Shark Tank’s most successful pitchers never had to endure.
Also Read: Gwyneth Paltrow Post-Divorce Career Crisis