"Campaign shot by the one and only @karllagerfeld!" Bella posted on Instagram. "What a dream come true to start off the new year! Thank you @chaos @pg_dmcasting @samuel_ellis and Karl I love you so much."
This isn't the first time the girls have teamed up. The models previously posed together for Balmain's fall 2015 campaign, which was released in July 2015. At the time, Gigi, 21, was already established in the world of fashion but Bella, 20, had yet to come into her own.