Yup. The beefcake has dropped his beef (that sounds weird) and all in the name of a film - incidentally the film is called The Wolf of Wall Street for the film fact fans amongst you.
Humpf. Thankfully Leonardo DiCaprio is set to save the day, by baring all in said very same film.
Yeah that barely works but you get the idea. He's lost weight, and by weight, we mean the kind of muscles that feel like radiators (hot and rippling radiators).
...here's Matthew McConaugh-wahey in a suit. Beneath that suit are some seriously shexy muscles. Mmm muscles.
Yup, even Colin's been at it. Slimming down for his role in Triage.
Sidenote: Colin doesn't sound all that sexy until you add a Farrell onto the end of it. Second sidenote: Nice of that lady to crack a smile for the camera... ahem.
*Just as shame about the low-neck t-shirt but we'll let that slide.
This is 50 cent how we know and love him...
And here the rapper turned actor is... having lost wait for Things Fall Apart. Thankfully he saw cents (ahem) and returned to a healthy weight as soon as filming wrapped.
The actress said she felt "gross" after slimming down 98 pounds for her role in Black Swan.
"I would literally look at myself in the mirror and I was like: 'Oh my God! I had no shape, no boobs, no ass. All you saw was the bone. I was like 'this looks gross.'"
Renee famously put on weight for her role as Bridget Jones, saying after filming: "I had a panic attack with all the specialists talking about how bad this is for you, long term, putting on (and losing) weight in short periods of time and they're all saying, 'You must stop this now or you're going to die'."
*It's hard to not come over all Allo Allo when you say Renee? No, just us?
The actress looked stunning at the 2012 MET Ball, though we like her as Bridget, aka just the way you are. (NB that's a tenuous Bridget Jones quote, sorry)...
Award-winning actress Charlize Theron was almost unrecognisable in her (cough Oscar and Golden Globe winning cough) film Monster based on serial killer Aileen Wuornos.
Err hello one of the world's hottest and most talented actresses, ever, Charlize Theron.
This picture of actor Christian Bale in The Machinist makes our eyes want to turn in on themselves. Click on the arrow above and fast...
Hmm, Matt showed some courage - perhaps under fire - when he lost wait for the aforementioned film. But he definitely looks better with some meat on his bones... come this way...
Who looks like he had the appetite of a chipmuck to play the (slightly more serious) role of a shipwrecked man (hence the title) who befriended a coconut...
But Tom's a veritable silver fox nowadays, see...