Boxing films represent some of the most successful instances of taking sport to the silver screen, and everybody has got their personal favourite which is almost certainly not Rocky V.
While the actors face the difficult task of staging fight scenes that will inevitably be critiqued for their lack of authenticity despite the fact that they are indeed not authentic, they also face the tough task of ditching their Hollywood lifestyles in order to obtain a body that would do a boxer justice.
We wanted to pay tribute to the men who made that sacrifice in this list, for which we had to exclude Sylvester Stallone because he was ripped in every movie he appeared in.
Russell Crowe in 'Cinderella Man'
After playing Maximus Decimus Meridius in 'Gladiator', Russ came back down to regular shape for 'A Beautiful Mind' and 'Master and Commander' before pumping the weights in preparation for the classic that was 'Cinderella Man'.
Robert De Niro in 'Raging Bull'
Taxi Driver, Deer Hunter, and The Godfather all saw Bobby D in decent condition, but he cultivated serious mass to play Jake LaMotta.
Mark Wahlberg in 'The Fighter'
Let's not talk about the body transformation that Christian Bale underwent for that film..
Will Smith in 'Ali'
Getting a six-pack wasn't the issue to play Ali, it was the upper arms and shoulders that had to be spot on, and Smith did a decent job.
Daniel Day-Lewis in 'The Boxer'
Known for his full commitment to his roles, Danny would have absolutely worked his arse off in the gym for 'The Boxer'.
Michael B. Jordan in 'Creed'
That is NOT 'Wallace' from The Wire. That is NOT 'Vince' from Friday Night Lights.
Denzel Washington in 'The Hurricane'
Another cracking film, and one of Denzel's most committed in terms of his dedication to the cause. It was worth it, a great performance.
Jake Gyllenhaal in 'Southpaw'
Easily the most eye-catching of this list, Southpaw didn't live up to it's early hype, but in fairness most of that hype was built off of the above leaved image of Jake Gyllenhaal looking almost stupidly muscular.
Usher in 'Hands Of Stone'
'Hands of Stone' came out in 2016 and features R'n'B star-turned-actor Usher playing the role of Sugar Ray Leonard.
Robert De Niro (again) in 'Grudge Match'
Yes, he's on this list twice, here's why:
a) He was 70 YEARS OF AGE when he starred in 'Grudge Match', so that deserves recognition.
b) 'Raging Bull' Robert Di Nero is a very different actor to 'Grudge Match' Robert Di Nero, as while the former only starred in blockbusters, the latter will now star in anything.