Costa was born in
Trieste,
Friuli-Venezia Giulia,
Italy, in 1953. She enjoyed drawing ever since her childhood, and at twelve she illustrated her first book, titling it
Il pesciolino piccolo. She earned a
degree in architecture from the
University of Venice in 1978. Upon earning her degree, she started working in the study of her father. Costa said that she liked her job, but she soon found out that her true passion was writing and illustrating
children's books, so, after publishing a number of children's books, she decided to pursue her passion. A TV series based on Costa's character Julian Rabbit debuted on
Rai YoYo in 2017. The character was already well known to Italian children and in the Italian literary world, and it was created by Costa several years earlier. After the release of the TV series, the character became the "
beniamino dei bambini." The production debuted in 2010 and was warmly received. It returned to Italian theatres the following year. Costa still lives and works from her city of birth, Trieste. ==Works==