Agoston is of Hungarian, Irish, English, and Austrian descent.

She was discovered in Paris while on holiday with her family.

[4] Her first modelling jobs were for Proenza Schouler, Monique Lhuillier, Christian Lacroix, Elie Saab, Armani Privé, Dior,[5] Comme des Garçons and Jean-Paul Gaultier.

[6] She's also walked for Naeem Khan, Badgley Mischka, John Galliano, Off-White, Christian Siriano, and David Jones.

[8] Agoston is in a relationship with photographer Chris Colls.