Wallis Day (born September 20, 1994) is an English actress. She portrayed Nyssa-Vex as a series regular in Krypton.




  • As well as an actress Wallis has always been a passionate writer and has some of her work published.
  • Wallis has been signed to top modelling agency, Models1 since she was 13, she was the youngest in the agency for 3 years.
  • Day was trained up to swim for GB in the 2012 Olympics, but stopped swimming competitively when acting became more prominent in her life. However she has since trained in martial arts and performs all her own stunts on set.


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