Zach Galifianakis

Another dramatic weight loss transformation is that of actor Zach Galifianakis. The 45-year-old Hangover star, first appeared noticeably thinner in October 2014 on his promotional rounds of Birdman and then shocked fans again on the SAG awards in January. Almost unrecognizable, Galifianakis told Conan O’Brien that his weight loss was due to him giving up alcohol. He joked, “I was having a lot of vodka with sausage…delicious but bad for you.” He hasn’t shared how much weight he’s actually lost, but it’s estimated to be about 50 to 60 lbs.