Val Kilmer
Val Kilmer became wildly popular in the 80s, and after playing roles in Top Gun, and Batman Forever his hunky leading man status was officially cemented. Over the years the actor has done a few projects here and there but pretty much stayed under the radar. When Val finally resurfaced he was barely recognizable; was much older and had clearly gained a large amount of weight.
However, less than a year later, Kilmer once again shocked the world when he was seen out looking drastically slimmer. His current weight loss is reportedly attributed to health issues.