Gallery: Check Out These Before And After Pics Of Celebs Who Lost A Ton Of Weight

In today's Hollywood there's a lot of pressure to be thin. It's not uncommon for celebrities to gain or lose weight for particular movie roles. It's even harder to find a balance between the two. 

We've rounded up 25 celeb weight loss stories that'll shock you. And with so many factors at play, and Hollywood diet secrets galore, it's great to see that these celebs have lost the weight and kept it off the HEALTHY way! Take a look through these before and after photos to see these uplifting celeb body transformations.