Jake Gyllenhaal shocked on the red carpet on Monday night, as he showed off a dramatic new look.
The actor revealed his new slimmed down self and his grown out hair at the 17th Annual Hollywood Film Awards, looking barely recognisable.
Jake Gyllenhaal last month (left) and pictured on Monday
The weight looks to be dropping off Jake, who was looking much more like his usual self just a month ago.
The 32-year-old's shocking transformation is for a new role in upcoming thriller 'Nightcrawler', in which he plays a crime journalist reporting on the seedy underbelly of Los Angeles.
But he isn't the first actor who's lost a dramatic amount of weight for a role - just check out these lot...
Actors Who've Gotten Skeletal For Roles
Matthew McConaughey(01 of11)
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Curtis "50 Cent" Jackson(02 of11)
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Christian Bale(03 of11)
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Christian Bale(04 of11)
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Colin Farrell(05 of11)
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Matt Damon(06 of11)
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Matthew Fox(07 of11)
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Michael Fassbender(08 of11)
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Seth Rogen(09 of11)
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Tom Hanks(10 of11)
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Tom Hanks(11 of11)
Weight Loss Stars
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(09 of19)
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(11 of19)
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