Mary Katrantzou is a Greek fashion designer based in London who explores the use of prints, embellishments and textures in her designs.

Katrantzou completed a degree in textile design and masters in fashion at Central Saint Martins. Her graduation show in 2008, which featured trompe l'oeil prints of oversized jewellery on jersey bonded dresses secured her a number of stockists including Browns, Joyce and Colette. After her graduation show, Katrantzou established her namesake brand. She now has over 100 high-end stockists ranging from Selfridges to Joyce, Matchesfashion.com, Harrods and Bergdorf's Goodman.

In 2010 Katrantzou was awarded the Swiss Textiles Award in recognition of her pioneering textile treatments, in 2011 she received the British Fashion Award for Emerging Talent, and in 2012 was awarded Young Designer of the Year at the Elle Style Awards. In 2015 Katrantzou received the Vogue Designer Fashion Fund, was awarded Glamour designer of the year, Harper’s Bazaar Breakthrough Designer as well as the British Fashion Award for New Establishment Designer. In 2019 Mary Katrantzou was the recipient of Vogue India's Designer of the Decade award for the 00's. 

Personalities including Cate Blanchett, Beyonce, Lizzo, Michelle Obama, Kylie Minoque, Tracee Ellis Ross, Naomi Campbell, Jane Fonda, Lupita Nyongo and Zendaya have dressed in Katrantzou's designs.