Mo Willems, a number one New York Times best-selling author and illustrator, has been awarded a Caldecott Honor on three occasions (for Don't Let the Pigeon Drive the Bus!, Knuffle Bunny: A Cautionary Tale, and Knuffle Bunny Too: A Case of Mistaken Identity). His celebrated Elephant & Piggie series has received two Theodor Seuss Geisel Medals. Other favorites include El conejito Knuffle: un cuento aleccionador, Naked Mole Rat Gets Dressed and Big Frog Can't Fit In: A Pop-Out Book.
Mo began his career on Sesame Street, where he garnered six Emmy Awards. He lives with his family in Massachusetts.