Not familiar with Rowan Blanchard? Consider this your briefing on Disney's most impressive export. She's shared a Teen Vogue cover with our forever-fave, Yara Shahidi, delivered a speech on gender inequality in front of the UN, penned a viral post about intersectional feminism, stars in the Disney Channel's Girl Meets World and sits front row at fashion weeks on the regs. Oh, and did we mention she's only 15? Yup. She cites RiRi as style inspo, counts Tavi Gevinson as a friend and has a cool 4.9mil followers on Instagram. We think it's 'bout time you became one of them…