Keira was born in Calabar, Cross River State. Keira was raised by her mother Elizabeth Hewatch.Her mother who was a teacher in the Nigerian Police Force was transferred to Minna, Niger State to teach in the Police secondary school and took 11 year old Keira with her. Hewatch's family relocated to Ghana in 2005, where she was enrolled in the Graduate school of Management Studies to study Travel and Tourism and Hospitality Management. In 2006, on completing her certification exams, Hewatch decided to pursue her passion for acting.She spent another year in Ghana trying to break into the entertainment industry to no avail, as most of the roles involved speaking the local dialect. In 2007, she returned to Nigeria, to continue pursuing her passion for acting.