Kätlin Aas (/ˈkeɪtlɪn/ KATE-LYN; born 26 December 1992) is an Estonian fashion model.
Aas has been managed by E.M.A Model Management, Women Management - Paris, Tess Management - London. She has modelled for brands such as Christopher Kane, Prada, Miu Miu, Versace, Givenchy, and Yves Saint Laurent. Aas is currently with the Marilyn agency. She is friends with Hanne-Gaby Odiele, Julia Nobis, Lexi Boiling, Issa Lish, Binx Walton, Julia Frauche.