The event has been sparking imaginations and instilling a love of reading for decades, with children and adults alike dressing up in honour of their favourite books.
See if you made our gallery below…
1. Kody- Maleficient
Who says boys can't be Maleficent?! We think Kody, 6, pulls off 'mistress of evil' pretty well. Photo: Melissa Robertson
2. Ruby- Queenie, Robyn- Holly the Kitten, Marie- Anastasia Tremaine
It's Queenie from Fantastic Beasts (Ruby, 11), Holly from A Kitten Called Holly (Robyn, aged 8) and Anastasia Tremaine (Marie, 6) one of the (not so!) ugly step sisters from Cinderella. Photo: Samantha Lister
3. Sonny- White Rabbit
Sonny, aged 8, looks great (and late, for a very important date) as the White Rabbit from Alice in Wonderland. Photo: Charlotte Hern
4. Cadiee, Cruz and Skyla- Peter Rabbit, Captain America and Willy Wonka
Cadiee, Cruz and Skyla of Meadowview Primary School dressed as Peter Rabbit, Captain America and Willy Wonka! Photo: Jono Wilmhurst