Designated by UNESCO as a worldwide celebration of books and reading, World Book Day is marked in over 100 countries around the globe.
It is celebrated annually in the UK and Ireland on the first Thursday of March.
Here are just some of the young people from the area who dressed in a costume inspired by their favourite books.
1. A mouse took a stroll through the deep dark wood...
Zachary Acton (5) from Newtownabbey dressed as The Gruffalo. Photo: Contributed
2. World Book Day 2023
Charlotte Irwin, Primary 2 at Corran Integrated Primary School, dressed as Wednesday Addams. Photo: Contributed
3. TC Tiger Cub
Jaxx McDowell from Newtownabbey dressed as TC Tiger Cub. Photo: Contributed
4. Mrs Twit
Grace Mckeown, Corran Integrated Primary, dressed as Mrs Twit from Roald Dahl's book, 'The Twits.' Photo: Contributed