This is the film’s fatal flaw. It argues that fat people are worthy of love, but it relies on the audience’s revulsion to make its point. It asks us to applaud Hal for looking past the very thing the camera is zooming in on with a comedic wah-wah sound effect. While the Farrellys are clearly on Rosemary’s side, the visual language of early 2000s cinema was not sophisticated enough to handle the nuance. Where Shallow Hal works best is in its depiction of conventional beauty as ugliness. When Hal’s spell breaks temporarily, he sees a supermodel on the street as a hideous, smoking, scowling gremlin. The film’s thesis is that vanity and cruelty are the real disfigurements. The most terrifying character isn’t a fat person; it’s Mauricio (Alexander), whose inner greed makes him look like a devil.
Jack Black, uncharacteristically restrained, plays Hal with a boyish naivete that makes him redeemable. He isn’t malicious; he’s just a product of a culture that worships thinness. Paltrow, meanwhile, deserves credit for a performance that relies entirely on voice and body language, as her face is obscured by prosthetics for most of the film. She conveys Rosemary’s warmth, insecurity, and intelligence without letting the physical gimmick define the role. No discussion of Shallow Hal is complete without addressing the elephant—or rather, the fat suit—in the room. In 2001, the idea of a thin actress gaining weight for a role was standard Oscar-bait (think Charlize Theron in Monster ). However, using prosthetics to portray obesity as a visual punchline or a tragic flaw has aged poorly. Shallow Hal
The film’s logic is paradoxical: To teach us that Rosemary’s weight doesn’t matter, the filmmakers have to show us how monstrous she should look to a shallow person. For the first hour, the audience sees the "hypnosis" version of Rosemary: Gwyneth Paltrow in a corset. We, like Hal, fall in love with her radiant smile and quirky charm. But the film constantly breaks the spell by cutting to the "real" Rosemary (played by dancer and model Lenny Clarke in a body double suit), reminding us that this wonderful woman is actually "fat." This is the film’s fatal flaw