We’re uploading loads of them every day to this gallery so you can show-off your dress-up skills to all your mates!
Check out some of our fave photos below. If you spot yourself, let us know in the comments below!
Ayden, aged 4, is dressed as PC Selby from Postman Pat
Alex, 11, has dressed up as Wally from Where’s Wally!
Sophie, 10, is the Mad Hatter this World Book Day!
This one’s very apt! Jamie, 11, is Jon Snow!
Georgie’s dressed as Emmeline Pankhurst!
Ana, 5, is The Little Mermaid!
Daisy Wart from You Can’t Make Me Go To Witch School
Lucy, 6, is a turtle for an under the sea theme
Polly is the Hungry Caterpillar!
Nathan, 5, is an Elf this World Book Day!
Teddy and Clara are Bert and Mary Poppins!
Rylie, 8, is celebrating World Book Day as Billionaire Boy!
Sophie’s Mildred from The Worst Witch!
Emily’s Pippi Longstocking!
Tippi and Ava are Orange crayon from the day the crayons quit and penguin from lost and found
Heidi and Darcy are both Gangsta Grannies!
Saoirse and Niamh is Thing 2 and Red Riding Wolf!
Aayushi, 10, is the Queen of Hearts!
Julia, 9, is Willy Wonka!
Amelia Fang from Amelia Fang and The Barbaric Ball
Megan’s Poppy/ Matilda from Shadow House
Megan’s The Mad Hatter and Alice from Alice’s Adventure’s
Matilda is Wish from the Wizards of Once!
Bethan, 10, is Miss Root from The Demon Dentist!
Phoebe-Jean’s dressed as Amy Cluckbucket!
Noah, 8, has dressed as The Boy in The Dress!
Tiffany is Mildred Hubble, The Worst Witch
Callum, 8, is the Tin Man this World Book Day!
Luke, 11, is celebrating World Book Day as Burt!
Erin, 7, is Gangsta Granny!
Kevin from Kevin by Rob Biddulph
Maddie, 9, is Shirley from “Wave Me Goodbye”!
Megan, 11, is Adam Meltzer from Memoirs of a Neurotic Zombie!
Lewis is dressed as The Grinch!
Lacie, Brandon, Morgan are Repunzel, Walking with dinosaurs, Maleficent
Jessica’s gone as Dorothy this World Book Day!
Scarlett, 5, is the Little Mermaid!
Erin’s dressed as Hermione!
Twins Eva and Matthew are Paddington and Mr Gum
Chloe and Amelia, 7 and 4, are sad as the snow has postponed World Book Day for them!
Lucy, aged 9, is dressed as Matilda!
Jasper’s dressed as Bear Grylls!
Jack-James is Willy Wonka!
George is Commando from the comic books!
Maya, 8, is Tracey Beaker!
Chris sent this to us on social media; It’s Roald Dahl from his RAF days and Isadora Moon!
Holly, 5, is Mildred Hubble, The Worst Witch
Savannah & Dominic are Postman Pat & Ben 10 Alien.
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