We simply can't believe it, but today is Kristen Stewart's 25th birthday! The actress started off as a child star, which means she's been hitting totally glamorous red carpets since she was a little kid. From showing off tomboyish looks and playing around with new trends, plus trying out a series of ever-changing hairstyles, Kristen has totally transformed her style as she's grown up. She's now a totally fierce trendsetter!
Click through the gallery to see how much Kristen's style has evolved over the years she's been attending red carpet events. Then, make sure to wish her a happy birthday in the comments below!