Born Ekaterina Sergeyevna Grigorieva in 1989, "Kate" grew up in Olenegorsk, Murmansk Oblast in the northwestern parts of Russia. She comes from a military family.
Kate kept it quiet until around 2012 when she ranked in the top 10 of the Miss Russia Pageant. That same year, she was a runner-up in "Russia's Next Top Model." Soon after, she traveled to New York and signed with her first modeling agency.
Her appearance on the show garnered some interest from the likes of Irina Shayk's agency, The Lions, which lead to her big debut in Fall/Winter Fashion Week in New York in 2014, walking for big brands like Donna Karan, Oscar de la Renta and Ralph Lauren. This was, indeed, the breakthrough year for Kate Grigorieva. Her walking popularity moved to Paris and Milan, modeling for more big names like Versace, Gucci and Dolce & Gabbana. By the end of the year, she was model.com's biggest model discovery of the season, appearing in H&M ads and Victoria's Secret catalogs, as well as landing magazine covers for Numero and Vogue in November.
By 2015, Kate was opening more of the biggest Spring/Summer collections for big designers, including English designer, Stella McCartney. Shortly after, she was picked up as one of the 10 newest Angels for Victoria's Secret after walking the runway in late 2014 with Irina Sharipova in the annual Victoria's Secret Fashion Show in London. She was met by other hot new angels like Stella Maxwell and Romee Strijd.