Calvin Harris may be a model for Emporio Armani underwear, but the 31-year-old wasn't always so, well, ripped!
The DJ shared a throwback photo from 2002, joking that he looked "f--king fantastic" in the dated pic. Even he knows he's aged EXTREMELY well!
But Taylor Swift's boyfriend isn't the only celeb who's improved since becoming famous. Scroll down to see more remarkable transformations!