Her style has been described as whimsical, and according to The Sydney Morning Herald, "there is delight, and childish embellishments".
[6] In her own words, she likes "to draw fat little ladies with hearing aids, weird infants with glasses, and domestic scenes; I see things as people at home see them".
[5] Her first cartoon strip, “My Sunday” appeared weekly in Australia's Nation Review when she was nineteen.
[5] Roberts has written and/or illustrated over 20 books, and received several grants, awards, and residencies, including an Australian Bicentennial grant for Australia Felix, a cartoon history of Australia published by Chatto & Windus.
Her first solo show, Nona, opened at the National Museum for Women in Washington D.C. in 2005, and went on to a season at Urban Stages in New York City.