[6][7] After meeting with a modeling agency in the Netherlands, Kos was told that her "hips were too big" to obtain a contract with them.

[9] Kos lived in Milan for two years in a model apartment to develop her career.

[12][13][14] She and Irish actor Jamie Dornan co-starred in a Hugo Boss advertising campaign which included a mini-movie in 2018.

[15][16][17][18][19] Kos appeared alongside Croatian model Faretta in the Spring 2019 campaign for Italian label Twinset.

[21] After signing to Elite Worldwide in 2014, Kos made her runway debut in Dolce & Gabbana's Alta Moda Fall 2015 show.