
Let’s be real: in Hollywood, many actors are serious about their craft, but then some totally take it to another degree. These are the actors who walk the line between acting and living, going so far into their characters that it’s both amazing and, honestly, a little concerning. From living in the wild to totally altering their physiques, here are the craziest, most jaw-dropping method acting transformations ever committed to film.

10. Jared Leto’s Joker Madness
Jared Leto’s take on the Joker in Suicide Squad might be one of the most talked-about (and infamous) examples of method acting gone off the rails. Staying in character 24/7, he reportedly sent bizarre gifts to castmates, including a live rat to Margot Robbie, and even moved around set using his character’s crutches and wheelchair. Director Daniel Espinosa reported that the crew waited for Leto to “arrive” as the Joker. It wasn’t an acting job; it was an entire experience no one on the set is likely to forget.

9. Jamie Foxx’s Blind Immersion in Ray
When Jamie Foxx played music icon Ray Charles, he went all out. For as much as 14 hours a day, Foxx had prosthetic eyelids glued shut so he couldn’t see a thing. The isolation was so overwhelming that he panicked on set. Plus, he lost more than 20 pounds to achieve Charles’s physical stature. It wasn’t simple, but it landed him an Oscar and one of the greatest biopic performances in history.

8. Adrien Brody’s Isolation for The Pianist
To perform as Holocaust survivor and pianist Władysław Szpilman, Adrien Brody bare-bones his existence. He sold his automobile, vacated his apartment, withdrew from his loved ones, and lost 30 pounds. He even trained himself to play Chopin compositions on the piano. Brody afterwards revealed that he had a hard time getting back into normal life after shooting, a ghostly reminder of just how profoundly he immersed himself.

7. Leonardo DiCaprio’s Grueling Survival in The Revenant
Leonardo DiCaprio didn’t merely perform like an actor fighting nature; he did it for real. To film The Revenant, he slept in animal hides, consumed raw bison liver, and braved subzero weather in far-flung wilderness areas. “It was living through a war,” he described the shoot. The ordeal was worth it; however, DiCaprio finally won his long-awaited Oscar.

6. Daniel Day-Lewis: The Patron Saint of Method Acting
If method acting had a Mount Rushmore, Daniel Day-Lewis’s face would be etched front and center. To prepare for My Left Foot, he was in character throughout the shoot, remaining in a wheelchair and having crew members feed him. He spent time even in a cerebral palsy clinic to prepare fully for his role. Whether it was mastering the art of shoe-making, constructing canoes, or surviving off the land, Day-Lewis’s complete submersion in each role he’s undertaken is acting legend stuff, and perhaps a touch of madness.

5. Natalie Portman’s Torment in Black Swan
Natalie Portman’s Oscar-winning turn in Black Swan was at a high price. She rehearsed as much as eight hours a day, lost 20 pounds, and had injuries like a dislocated rib and broken toenails. Portman confessed later that she worked herself so hard she thought she could “literally die.” Her performance brought about that slide into madness so realistically because she was actually undergoing it.

4. Austin Butler’s Elvis Possession
Austin Butler didn’t merely act as Elvis Presley; he became him. For three years, he talked, walked, and sang like the King, remaining in character well after the cameras ceased recording. He even lost his normal voice and had to be assisted to speak regularly again. “I did not see my family for three years,” Butler admitted. The process was so engrossing that director Baz Luhrmann revealed Butler was “haunted by Elvis’s spirit.”

3. Christian Bale’s Extreme Body Swings
Few actors cruelly abuse their bodies for work like Christian Bale. He lost a shocking 60+ pounds for The Machinist, then gained superhero bulk for Batman Begins mere months later. He gained weight again for American Hustle and Vice. Physicians have warned that these extreme swings can result in lasting harm, but Bale’s commitment to his work is both incredible and, let’s be honest, a bit chilling.

2. Heath Ledger’s Plunge into Insanity
Heath Ledger’s Joker in The Dark Knight is perhaps the most terrifying and memorable performance ever captured on film. In preparation, Ledger spent a month in seclusion in a hotel room, keeping a diary packed with the Joker’s demented musings and trying out his character’s cackle and voice. He even had Christian Bale punch him in the real world during the interrogation scene. The emotional cost was staggering. Ledger passed away before the release of the film, leaving behind a performance that cemented both his own legacy and that of method acting’s dark side.

1. When the Method Goes Too Far
There is a thin line between commitment and self-destruction, and some actors don’t bother with that line. According to psychologists, excessive method acting can distort an actor’s sense of self, causing them to become exhausted, dissociate, or worse. Lady Gaga claimed to have suffered “psychological difficulties” after House of Gucci. Austin Butler and Adrien Brody have themselves confessed they took time to “find themselves” again. Even Natalie Portman and Christian Bale have commented on the physical cost of their metamorphoses. The reality? Method acting can create cinematic magic, but at times, it leaves marks that linger long after the final cut.

Hollywood adores commitment, but the stories they tell us remind us that becoming someone else entirely has a very real price. Sometimes the biggest performance of all is simply making it back to your own self.