In his career spanning three decades, Leonardo DiCaprio has navigated various genres; however, it's mystery thrillers that have brought the best out of him. As the Hollywood actor turns a year older today, we have handpicked five of our favourite mystery thrillers starring Leo. Take a look.In his career spanning three decades, Leonardo DiCaprio has navigated various genres; however, it's mystery thrillers that have brought the best out of him. As the Hollywood actor turns a year older today, we have handpicked five of our favourite mystery thrillers starring Leo. Take a look.