Valerija Sestic is a professional fashion model from Switzerland. Her Croatian mother has been a model, so she has been modelling since she was a little girl. Her big breakthough came during the New York Fashion Week S/S 12; afterwards people found out her agency (Women Management) had been lying about her age to meet the new model age requirement, saying she was 16 when she was only 15. She speaks English, Italian, French, Croatian and German fluently.

She has walked in fashion shows for name such as Hervé Léger, Doo.Ri, Oscar De La Renta, Dolce & Gabbana, Rodarte, Moschino , Y-3, Theyskens' Theory, 3.1 Phillip Lim, DSquared², Gianfranco Ferrè, Just Cavalli, DKNY, Philosophy di Alberta Ferretti, Anteprima, Prabal Gurung, BCBG Max Azria, Blumarine, Tory Burch, Carolina Herrera, Ports 1961, Marc Jacobs, D&G, and Rag & Bone.

She has done advertorial work for D&G.

She appeared in editorials for Vestal, Jalouse and V Magazine.

She's currently signed with Talia Models in Zagreb, Select Models in London and with Women Management in New York, Paris and Milan.