Hilary Duff, Kristin Cavallari, Adele and more stars who were under 30 when they welcomed their first child
The younger sister of Beyonce married Daniel Smith in February 2004 when she was 17. She gave birth to their son, Daniel Julez, in October 2004. Knowles and Smith divorced in October 2007. "We would have gotten married for sure anyway, but then I found out I was pregnant," Knowles told the Evening Standard Magazine. "We were crazy, impulsive teenagers and I was obviously craving some sort of stability."
Credit: Jamie McCarthy/WireImage.com