Katharine Light was born in Glasgow and lived there until her family moved to South Manchester when she was ten. While in her teens, she began writing stories for her younger sister. These mostly centred around a naïve heroine and a 1980s pop star (some would say the hero was modelled on John Taylor of Duran Duran).

She did a degree in psychology at University College London, and after a year travelling, worked in corporate film production for several years, before taking a break to raise her children. During this time, she did two year-long writing courses with the Open University, and completed a first draft of Like Me, book one of The Millingham Series. She wrote mainly during the holidays, and around her busy work for a local church.

During 2018 and 2019 she studied on The Novel Studio course at City, University of London, focusing on Like Me. She recently won the competition City Writes, with her short story My arms are empty, which is based on an episode from Me Too, book two of the series. She was thrilled when Like Me was shortlisted for the Selfies Book Awards 2024.

Katharine lives in South-West London with her husband and quite often at least one of their adult children. She loves singing, walking, painting, looking at art, and going to the theatre.