How old is Liza Koshy, what is her age? This image appears in the gallery:Work It Actress Liza Koshy: Age, Net Worth & Everything You Need To Know 2. How old is Liza Koshy, what is her age? Liza is 24 years old, her birthday is 31 March 1996. 11 images See the full gallery: Work It Actress Liza Koshy: Age, Net Worth & Everything You Need To Know