STOMP it anytime, anywhere.
Download the new STOMP app today.
There is nothing wrong with the dad bod, best described as "softly round", but when your favourite actors "glow up" and trade in their once cuddly physiques for six-packs and biceps, you cannot help but let your jaw drop.
Remember when Zac Efron was a scrawny kid with a toothy smile?
Or when Chris Pratt got rid of his pot belly in order to emulate Star-Lord in Guardians of the Galaxy?
They aren't the only ones who dedicated themselves to transforming their bodies into mean machines.
Check out the gallery above compiled by AcidCow and tell us if you preferred how these actors looked before or after.