Today, for those who don't know, it's World Book Day, where every child in full-time education in the UK is given a £1 voucher to spend on books in a bid to get children into reading.
To celebrate the day, youngsters are also encouraged to dress-up as their favourite book characters.
This year’s World Book Day - the 24th one in history - falls on Thursday 4 March 2021. The event is always held on the first Thursday of March each year.
The date was chosen because it was the anniversary of the death of William Shakespeare and Inca Garcilaso de la Vega, a prominent Spanish Chronicler.
Some school children from Northamptonshire are now barely recognisable as they get into the spirit of the day.
So-far, we've seen Harry Potter, Captain Jack Sparrow, superheroes and some animal magic in a range of outstanding outfits from all of you.
Thank you to everyone who sent a photograph to celebrate World Book Day - you can still send in your photos here and we hope you enjoy your day.
A full list of the books available using the £1 scheme is available to view on the World Book Day website.
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Harlee and Buddy-Love are among the north Northamptonshire literature fans dressing up to celebrate World Book Day.
. The Little Mermaid and The Lord of the Rings
Pixie, 6, and Bailey, 8, from Brambleside School didn't want to miss out on the fun today while they're being homeschooled. They dressed up as The Little Mermaid and Gandalf.
. 101 Dalmations
Evie Murphy, 9, has been transformed overnight and woke up looking a little like Cruella Deville this morning.
. Pirates of the Carribean
Arrrr Matey! Charlie is barely recognisable this morning after turning into Captain Jack Sparrow.
. Gangsta Granny
This little Gangsta Granny Lily-Grace Allin was inspired by David Walliam's book. She dressed up this morning to surprise her class and teachers online today.
. Peppa Pig
Rebecca Ingram dressed up as a giant, inflatable Peppa Pig to surprise the children at her nursery school.
. The Stick Man
Three-year-old Robert Abbott-Mitchell has dressed up today to join in the book action as The Stick Man.
. Alice in Wonderland
Michael has gone to great efforts to resemble the Mad Hatter from Alice in Wonderland, with a curly orange wig and trademark top hat.
. The Emperor's Egg
Ellis has become a penguin for the day, inspired by characters from The Emperor's Egg books.
1. The Little Mermaid and The Lord of the Rings
Pixie, 6, and Bailey, 8, from Brambleside School didn't want to miss out on the fun today while they're being homeschooled. They dressed up as The Little Mermaid and Gandalf.
2. 101 Dalmations
Evie Murphy, 9, has been transformed overnight and woke up looking a little like Cruella Deville this morning.
3. Pirates of the Carribean
Arrrr Matey! Charlie is barely recognisable this morning after turning into Captain Jack Sparrow.
4. Gangsta Granny
This little Gangsta Granny Lily-Grace Allin was inspired by David Walliam's book. She dressed up this morning to surprise her class and teachers online today.