Even if you don't know the life story of Jane Birkin (whose name just so happens to have a casual "OBE" attached to it... #goals), you've probably added a snap of the British actress and singer to your Pinterest and Tumblr at some point. As she celebrates her 68th birthday, here's exactly why she's been an icon of cool for the past five decades. To up the retro realness even more, get ready for eight epic pics of Jane nailing it in dresses back in the '60s. HBD, you legend!