Charlotte Gainsbourg and Lou Doillon
These two share remarkably stylish genes: both Charlotte and Lou are the daughters of actress and singer Jane Birkin and are successful in their own right. Charlotte is an actress and singer, as well as the long-time muse of former Balenciaga designer Nicolas Ghesquière. Younger half sister Lou has posed for Gap and serves as a muse for Givenchy, Burberry, and Vanessa Bruno. She also modelled for the Pirelli calendar in 2007.