It’s a boy! It’s a girl! It’s…unexpected. Celebrities know as well as the best of us: not every child is planned. Whether it’s Arnold Schwarzenegger’s progeny from an affair with a staffer or Steven Tyler finding out that the 11-year-old soon-to-be bombshell Liv Rundgren is actually his daughter, Liv Tyler, plenty of stars have made tabloid headlines over the years when a surprise love child enters the picture. Here, a look back at some of the most famous cases.