Ashley and Mary-Kate Olsen

Bianca and Coco Brandolini

Cara and Poppy Delevingne

Catherine Deneuve and Françoise Dorléac

Dakota and Elle Fanning

Elektra and Miranda Kilbey of Say Lou Lou

Este, Danielle, and Alana Haim

Franca and Carla Sozzani

Jacqueline and Lee Bouvier

Sama and Haya Khadra

Virginie and Claire Courtin-Clarins

Pippa and Kate Middleton