Zach Galifianakis
Whether you are familiar with his work on The Hangover trilogy or Between Two Ferns, Zach Galifianakis was known as a big guy. However, in 2014, he decided to quit drinking and made an impressive 50-pound weight cut.
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Jonah Hill
Jonah Hill deserves all the credit he is receiving for dropping many pounds. You might not even recognize him if you know him from his work on Superbad.