Most famous people fall into two categories: the "popular" group, which consists of cute, inoffensive actors and actresses who are entertaining (albeit slightly disposable), and the much smaller "respected" group, an elite club of stars known for their hard-hitting, weighty performances. Very few celebs from the first group are allowed to transition into the second group, but there are exceptions. Zac Efron is latest star hoping to make the leap with Me & Orson Welles. In honour of Efron, we're taking a look at 10 stars who lost their cute baby fat, instead opting for slimming, credible roles.