Kelly Corrigan has been called "the voice of her generation" by O, The Oprah Magazine and "the poet laureate of the ordinary" by The Huffington Post. She is the author of the New York Times bestsellers Tell Me More, The Middle Place, Lift, and Glitter and Glue. Her podcast Kelly Corrigan Wonders and her PBS Show Tell Me More keep her busy enough to occasionally forget she is about to be an empty nester. She lives near Oakland, California. Hello World! is her first—but not her last—book for children.

Stacy Ebert Makes her debut picture book as the illustrator of Hello World! She is also the illustrator of the middle grade book How to Build a Story... or, the Big What If, written by Frances O'Roark Dowell. She lives in Minnesota with her husband and three sons, tinkering with words and drawing funny pictures. Find out more about Stacy at www.stacyebert.com.