Matthew McConaughey really does suffer for his art - the actor has lost 30 pounds to play an AIDs sufferer in 'The Dallas Buyers Club' - and looks unrecognisable as a result.
The usually buff star - who has been on an extreme diet to play AIDs patient Ron Woodruff in the film - was spotted on set in New Orleans.
And just a few days earlier, the star went unnoticed as he caught a flight from LAX looking a shadow of his former self.
Matthew has shed the weight thanks to a high-protein, low carb diet and sticking to cardio workouts.
Speaking about the challenging role to US Weekly, he said: "I'm playing a guy who was sick and would have loved to have been healthier but wasn't.
"For me, it's more of a mental thing than a physical thing. I'll get down to the weight I need to get to. I'm on my way, and it's what I need to do for the job."
Meanwhile a source told People: "Matthew's at his absolute lowest weight. In a month, he'll begin to put it back on."
> IN PICS: CELEB FAT FIGHTERS
At her thinnest Natalie wanted the whole world to know she'd lost weight. An inevitable work out DVD followed.
The Steps singer managed to shed the weight she gained after the band split, but then she fell pregnant and battled to lose it since.
Dawn French was always been known for being a bit on the larger side, and that's why we loved her. Well, there's less of her to love now as since her split with Lenny she's shed a fair few pounds.
James Corden's role in <em>One Man Two Guv'nors</em> helped him to shift over five stone.
That picture on the left actually scares us. It's like she wants us to motorboat in that cleavage. Bleugh.
It was revealed that Geri's dramatic weight loss was due to an eating disorder. Luckily she's settled back to a healthy weight now.
Gastric-band-gate swept the nation when it was revealed Fern hadn't exactly told the truth about her weight loss.
He's the man of the moment on The X Factor, but after the original Take That split Barlow ballooned.
TOWIE's Gemma shed four stone on a bid to win Mick Norcross. She gave up the bags of crisps but didn't manage to bag the bloke. Good job she's got Arg now then.
Pete's frame isn't the only thing shocking here. WTF is with that hair? Anyway, Pete shed the pounds when he split with Jordan. We didn't hear anything about that?
Eh up, don our Kerreh look slim. Must 'av been on t'Weight Watchers.
Jack Osbourne has struggled a lot with his size and is still yo-yoing with his weight now.
Gerard Butler has never exactly been a porker, but he's swapped his stocky frame for a much leaner one.
Jessie Wallace looked unrecognisable after slimming down, but since returning to Easties, Jessie has regained Kat's curvier figure.
<em>Superbad</em> actor Jonah Hill made jaws drop across the world when he unveiled his new look at an awards bash. He's hoping to lose more too.
Former Emmerdale actress Pauline Quirke lost several stone after being told she was morbidly obese.
Bristolian comic Justin Lee Collins has gone from rock-sized to rock star after dieting.
The once teeny weeny, leather-chaps wearing Christina Aguilera got tongues a-wagging when she ditched her slight frame.
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