Elizabeth 'Lucy' Cousins is an English author and illustrator of children's books. She is best known for her books featuring Maisy Mouse.

Lucy Cousins is the creator of many wonderful picture books for children, including Yummy: My Favourite Nursery Stories and Hooray for Fish! , as well as her bestselling books about Maisy the mouse.

Cousins, whose parents were also artists, was interested in children's books from an early age. But it took until the end of six years in art college for her to decide that she wanted to create children's books. She attended the Royal College of Art, where she met Quentin Blake, who encouraged her work. Her sense of design and color that she uses to this day, she developed while she was at the Royal College of Art.

Cousins' work, especially Maisy, are a successful publishing brand, with books printed in 27 different languages and over. Her books are aimed at preschool-aged children and younger or older, her "simple and vibrant" illustrations are attractive to "the eye of the prereading child."