[1] She was coached by champion diver Don Webb and won medals in the 1963 Pan American Games and the 1965 British Swimming Championships.

Stewart was a former gymnast and married golfer Phil Brownlee in January 1966 and later retired from competitive diving that year.

[4] Prior to a big event, she would train every day of the week for at least three hours at a time, traveling 10 miles (16 km) to the Leaside Aquatic Club from her home in the Toronto suburb of West Hill.

[5] Former Olympic diver Irene MacDonald announced her retirement in 1961, citing among her reasons that she thought it was time to allow other Canadian girls the opportunity to compete, and in particular Judy Stewart, who she described as "the best woman competitor in Canada that I have seen since I have been diving".

[6] In 1963, Stewart won a silver medal at the São Paulo Pan American Games in the women's 3 meter springboard.