16. Rob Riggle
Prior to beginning his career in comedy, Rob Riggle was an officer in the US Marine Corp, serving in Liberia, Kosovo, and Afghanistan. He transitioned from military service to pursuing his acting career in 1997, when hefirst started with UCB. In a previous interview with Complex, Riggle discussed his beginnings at UCB: "I took a stand-up comedy class and I hated it. I thought I made a huge mistake. I thought to myself, 'Why did I give up flying for this?' Then, I went down to the UCB, saw a show called Asssscat on Sunday night and I was blown away. I was like, 'That's it, that's exactly what I want to do.' "
It's worked out well for Riggle, who has landed dozens of roles in the last decade, in films as varied as The Lorax and 21 Jump Street.