"The Boy in the Dress" is a children's book written by David Walliams. It tells the story of a young boy named Dennis who enjoys wearing dresses, which makes him feel happy and free. Despite facing challenges and bullying from his peers, Dennis learns to embrace his individuality and express himself. The story explores themes of identity, acceptance, and the importance of being true to oneself. With humor and heart, it encourages readers to celebrate differences and promotes understanding among children. The book is illustrated by Quentin Blake, adding a whimsical touch to the narrative.