They are sisters who have made successful careers in modelling before bursting onto the acting scene. br But Cara and Poppy Delevingne took a break from their busy schedules to enjoy a panoramic boat trip just off the coast of sunny St. Tropez, France on Saturday. br Movie star Cara, who recently rang in her 25th birthday on a trip to Mexico, put her supermodel figure on display in a tiny strapless bikini.