Anthony Lee Ross (born 10 August 1938) is a British illustrator and author of children's picture books. In Britain he is best known for writing and illustrating his Little Princess books and for illustrating the Horrid Henry series by Francesca Simon, both of which have become TV series based on his artwork.

He also illustrates the works of David Walliams. He has also illustrated the Amber Brown series by Paula Danziger, the Dr. Xargle series by Jeanne Willis, and the Harry The Poisonous Centipede series by Lynne Reid Banks.