Lauren Castillo has illustrated many books for children, including Happy Like Soccer by Maribeth Boelts and Yard Sale by Eve Bunting. Lauren Castillo is also the author-illustrator of the Caldecott Honor Book Nana in the City. She lives in Harrisburg, Pennsylvania—the setting of Just Like Millie—with her two rescue dogs, who helped her acclimate to the city when she first moved there.
