Chris Pratt, Guardians of the Galaxy – 80 Pounds

Hollywood leading men are no strangers to drastic weight gain and loss according to whatever their latest role’s requirements happen to be. Chris Pratt, however, has taken the practice to some extremes in his time. During his stint on ‘Parks and Recreation,’ the lovable comic weighed nearly 300 pounds at one point, causing lethargy and unpredictable mood swings.

Pratt was determined to make a change, though. Initially losing weight in 2012 to appear in ‘Zero Dark Thirty,’ getting his first major big-screen lead in Marvel’s ‘Guardians of the Galaxy’ resulted in the charismatic actor shedding yet another 80 pounds – Go, Chris!