Kendall and Kylie Jenner
Who they are: Kendall Jenner went from reality TV star to top model in almost a blink of an eye. The star has landed several Vogue covers, walked in shows such as Chanel and Marc Jacobs, and held big-time deals with brands such as La Perla and Adidas. Her street style is closely watched by fans, and whatever she wears, you know it'll be good.
Kylie, on the other hand, has made her mark in the beauty world by launching her own line and is the queen of social media with 106 million followers. Her most important job to date, however, is probably being a mother to her little girl Stormi.
Though the sisters have each found their own niche in Hollywood, the two do run a namesake clothing line, Kendall and Kylie, and have designed everything from swimsuits to sunglasses together. Throughout it all, Kendall and Kylie have remained BFFs, as seen out together in 2015.