Princesses, superheroes and villains were among an array of characters spotted in Pendle.
From Harry Potters, to Roald Dahl creations, to Disney classics, a diverse selection of fictional favourites could be seen attending school and nurseries in the borough for the annual event.
Youngsters truly got in the spirit of the day, using their imaginations to come up with some impressive costume ideas.
Schools from across the area were involved in helping bring characters to life, including Pendle Vale College and West Street Community Primary School, in Colne, where staff chose the theme of traditional stories.
A Pendle Vale spokesman said: “Pendle Vale College actively took part in the World Book Day. The senior leadership team even got involved portraying themselves as characters from Harry Potter.
“In addition students and staff were asked to decorate their doors as book covers and there were a number of different world book day activities taking place including a Drop Everything and Read hour in the afternoon.
“This is in full support of the college’s consistent multi layered approach to improving reading and all aspects of literacy with its students.”
West Street’s literacy leader Lyndsey Jackson said: “The whole day was brilliant with staff, children and parents putting in a lot of effort. All our work on the day revolved around World Book Day and helped to develop a real enthusiasm for reading and books.”
Headteacher Sarah Burtoft added: “We had prizes for costumes and for knowledge about their character as well as giving children their book voucher. Next year we shall be offering parents the opportunity to dress up and to spend the day with us so they can be part of the fun.”
Several million schoolchildren across the country received a £1 World Book Day book token.