Here's How Jake Gyllenhaal Lost 20 Pounds For His New Movie 'Nightcrawler'
In May, 33-year-old actor Jake Gyllenhaal was back to his beefy leading man looks as he sat courtside during the <span>NBA Playoffs at the Barclays Center.<img src="http://static3.businessinsider.com/image/5411fc356da811007141de40-1200-1091/jake-gyllenhaal-clapping.jpg" border="0" alt="jake gyllenhaal clapping"></span>
<span>But for the majority of this year, Gyllenhaal was sporting a much leaner look while he shot his new movie "Nightcrawler," due in theaters October 31.<img src="http://static1.businessinsider.com/image/5411fced69bedde0608bb289-1200-924/jake-gyllenhaal-1.jpg" border="0" alt="jake gyllenhaal"></span>
"Nightcrawler," in which Gyllenhaal both stars and is a producer, is the story of a<span> career-hungry young man who stumbles upon the underground world of L.A. freelance crime photojournalism.</span>
Gyllenhaal spent three months in pre-production brainstorming with screenwriter and first-time director Dan Gilroy on the appearance of his character, Lou.
"I knew that [Lou] was literally and figuratively hungry," Gyllenhaal told Us Weekly, <span>adding that he got into character by transitioning into a "mode where I was always a bit hungry." </span>
In order to <span style="line-height: 1.5em;">drop 30 pounds from his 180-pound frame, Gyllenhaal told Variety: "I would try to eat as few calories as possible. I knew if I was hungry that I was in the right spot. Physically, it showed itself, but chemically and mentally, I think it was even a more fascinating journey. It became a struggle for me."</span><img src="http://static4.businessinsider.com/image/5411f1b06bb3f7395ce99dbb-1200-500/screen-shot-2014-09-11-at-3.00.07-pm.png" border="0" alt="Jake Gyllenhaal Nightcrawler" style="color: #000000;">
<span>"He'd have a bowl of luxury chewing (gum) and they were, like, really elaborately flavored, to trick his brain into thinking he was having a meal," <span>Gyllenhaal's co-star Riz Ahmed told </span>The Canadian Press<span> at the Toronto Film Festival this week. "</span>So he was on his exercise bike having chewing gum and, like, almond tea with one calorie."</span>
<span style="line-height: 1.5em;">He also said Gyllenhaal was aw</span><span style="line-height: 1.5em;">are and apologetic about his sometimes-sour demeanor, "So he was like: 'Sorry I'm grumpy, I haven't eaten."'</span>
<span style="line-height: 1.5em;">On some nights during shooting, Gyllenhaal told Variety he wouldn't eat at all, or he'd only take small bites of meat, crackers, or kale salad. To stay lean and fit, he <span>would run 15 miles from his house to the film's set.</span></span>
<span style="line-height: 1.5em;"><span><span>"There was a general sense that he was a coyote," Gyllenhaal says. "I just wanted to live that way."</span></span></span>
<span style="line-height: 1.5em;">Gilroy adds: "When you watch the film and see the angularity of his face, the hollow cheeks, the way that his eyes become prominent <span>—</span><span> </span>it's such a haunting look for a night shoot."<img src="http://static5.businessinsider.com/image/54120ab169beddf91f8bb28b-1200-498/screen-shot-2014-09-11-at-2.58.44-pm-1.png" border="0" alt="Nightcrawler Jake Gyllenhaal lighter"></span>
Gyllenhaal's co-star and Gilroy's wife, Rene Russo, told E! Online, <span style="line-height: 1.5em;">"It's incredible what he put his body through. </span><span style="line-height: 1.5em;">I actually was worried."</span>
But this isn't <span style="line-height: 1.5em;">Gyllenhaal's first physical transformation for a film.</span>
<span style="line-height: 1.5em;">In 2010, the Oscar nominee added major muscle to his physique for "</span>Prince of Persia<span style="line-height: 1.5em;">." The actor told UsWeekly at the time that he would eat six small meals loaded with protein, carbs, and fats. </span>
<span style="line-height: 1.5em;"><img src="http://static4.businessinsider.com/image/5412087e6bb3f76458e99dbb-640-320/prince-of-persia-jake-gyllenhaal.jpg" border="0" alt="Prince of Persia Jake Gyllenhaal" width="600">
<span style="line-height: 1.5em;">Gyllenhaal, however, says there was no special diet to shed pounds for</span> "<span style="line-height: 1.5em;">Nightcrawler.</span><span style="line-height: 1.5em;">" </span></span>
<span style="line-height: 1.5em;">"I just love this movie," he said. "That's how I did it. There really was no technique."</span>
<span style="line-height: 1.5em;">Watch the "Nightcrawler" trailer below. Gyllenhaal's performance is already being called "stunning":</span>
<iframe width="560" frameborder="0" src="//www.youtube.com/embed/nC95NXEQruQ"></iframe>
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