The sporting scene is often the place where some of the world's most incredible and extraordinary figures strut their stuff in an attempt to showcase themselves to a global audience.
From the robust to the lean, we've seen many different body-types hit the elite stage, but on occasions, some of the biggest names in the world of sport have gone through transformations throughout their illustrious careers.
Of course change is (usually) a good thing; athletes, and even your everyday commuter, attempt to transform themselves. From losing weight to gaining muscle, it's human nature to better yourself, especially when you're an athlete enjoying the riches of what the industry has to offer.
Unsurprisingly, over the years, the media and fans alike haven't missed a trick in terms of body transformation, so we're going to take a look at some of the best *developments* in recent time...
There's only one place to start, isn't there...David Beckham is now recognised as one of the most glorious icons there is.
But, it wasn't always that way. The now retired 'Golden Balls' may well have struck gold when he married a Spice Girl, but he certainly wasn't recognised as the dishy hunk that he is today.
Of course he always had the look, but his flamboyant nature didn't exactly entice everyone. Now, though, he is a god amongst men and women alike, and is looking better than ever despite his retirement from the game. Brand Beckham may be around for a little while longer yet.
At 25-years-old, British boxer Anthony Joshua is an incredible athlete and one that has worked extremely hard to get himself where he is today.
You only have to go back to the London Olympics of 2012, where Joshua first came to prominence, to see that he wasn't always the machine that he is now. Ultimately, as an amateur, he secured himself a gold medal, but he's certainly not rested on his laurels on his way to the top.
Since turning professional, Joshua has gone from strength-to-strength. He really has. He was big before, but now he's on another level. I mean just look at him in this photo alongside Carl Froch...
'If you smell what The Rock is cooking'. There's no doubt about it, Dwayne Johnson, AKA the Rock, has certainly been eating something rather special over the past decade or so to get where he is today.
Entering the wrestling scene, Johnson, who has an entire family involved in the organization, wasn't exactly limited in terms of a physical presence, but he's now a colossal figure, who has enjoyed success on the big screen too.
Johnson may well be 42-years-old, but he's in better shape than ever, and is a force to be reckoned with.
And that brings us nicely on to the eccentric Cristiano Ronaldo. The Portuguese superstar, who is recognised as one of the world's greatest ever football players, has certainly taken extreme measures to get into the best physical shape possible.
One thing's for sure, the Real Madrid forward has almost the perfect figure as he goes in search of breaking all records on the footballing scene.
However, it wasn't that long ago that he arrived in Manchester as a scrawny teenager. Hard work has certainly paid off for CR7; you can do anything if you put your mind to it...
Back over to the US now, and CC Sabathia has certainly gone through quite the transformation throughout his career.
Once upon a time, Sabathia was on the end of numerous jokes, as his rather large frame pitched for the New York Yankees.
Enough was enough for Sabathia, however, as from out of nowhere he completely transformed himself into quite the eye-catching figure. Ultimately he's been putting the pounds back on of late, but he's certainly kept us on our toes.
John Daly has endured an up-and-down career on the golfing scene. Seemingly that colourful lifestyle has stuck with him in terms of his personal appearance too.
Incredibly, in 2009, Daly lost over 100-pounds in weight as he silenced his critics and helped himself get around the full 18 holes on the golf course.
Now, approaching 50-years-old, Daly has put some of that weight back on, but we will let him off for what he achieved back in '09.
That's certainly six of the best, but who deserves their place on this list? Name your favourites below!