Sophie Blackall is an Australian illustrator based in New York. Blackall has illustrated more than forty children's books, including Finding Winnie, for which she won the 2016 Randolph Caldecott Medal, and Hello Lighthouse, which won the Caldecott Medal in 2019. She is the illustrator of the long-running Ivy & Bean series of early reader chapter books, and the author of the picture book If You Come to Earth, also from Chronicle Books.