Jillian Tamaki is an illustrator and comics artist living in Toronto, Ontario. 

She is the co-creator, with her cousin Mariko Tamaki, of Skim and This One Summer, the latter of which won a Caldecott Honor and Printz Award in 2015. Her own graphic novels include SuperMutant Magic Academy and Boundless. Her first picture book, They Say Blue, which explores our perception and experience of the natural world, was released in March 2018 and just won the Boston Globe-Horn Book award.