Prince William is now formally known as the Duke of Cambridge [1], but before his mother, Princess Diana, tragically passed away [2] in August 1997, he was known as "wombat" (well, at least to her, anyway). In a 2007 interview with NBC's Matt Lauer, the prince revealed that "wombat" was Diana's nickname for him [3] when he was a kid. "It kind of stuck with me. I can't get rid of it now," he said. "It began when I was 2. I've been rightfully told because I can't remember back that far. But we went to Australia with our parents, and the wombat, you know, that's the local animal . . . So I just basically got called that. Not because I look like a wombat — or maybe I do." While we still can't decide whether we prefer Diana or Kate Middleton's nickname for William more [4] — they're both really sweet.