Born in London UK she is an only child of Lloyd G Williams a now deceased Supreme Court Justice of the British Virgin Islands and St Kitts and Korah H Williams a retired Registered Nurse Both Tonyas parents are Jamaican but met in the UK at University and married there When Tonya was 1 12 years old she and her parents moved to Kingston Jamaica where her father set up practice At the age of 4 12 while in Jamaica she contracted Rheumatic Fever and was hospitalized for 6 months Shortly after that her parents divorced and her Mother returned to the UK with her They lived in Birmingham UK where Tonya attended the private schools York House and then Greenmoore College When she was 12 years old her Mother emigrated them to Oshawa Canada a city just outside of Toronto It was during High School that Tonya began her career as an actress At the age of 16 she booked her first TV commercial for the Bank of Nova Scotia and shortly after that she was on the Milk Wear A Moustache commercial which catapulted her into a national campaign across Canada and made her a household name After High School she enrolled at Ryerson University Drama Program in Toronto