Celebrate Horrid Henry's 20th Birthday with bestselling author Francesca Simon.

Discover what led her to create everyone's favourite naughty boy.

Step into the world of Horrid Henry and relive 20 years of hilarious adventures.

Get a sneak preview of Horrid Henry's Krazy Ketchup, the brand new storybook coming in June 2014.

Queen Elizabeth Hall, 2pm

For ages 6+