The Royal couple visited Holy Trinity First School in Berwick on the second stage of a whistle-stop tour of the UK.
Over three days, The Duke and Duchess are travelling 1,250 miles on the Royal Train with stops in England, Scotland and Wales, meeting frontline workers, volunteers, care home staff, teachers, schoolchildren and young people to hear about their experiences, sacrifices and the inspiring work they have done throughout this challenging year.
Take a look at these 20 pictures of their visit to Northumberland...
17. Station bound
The Duke and Duchess of Cambridge at the end of their Berwick visit. Photo: Ian Smith
18. Class discussion
The Duke and Duchess hear that Year 3 pupils have been learning about the Victorians. Photo: Ian Smith
19. Duchess of Northumberland
The Duchess of Northumberland chats to pupils. Photo: Ian Smith
20. Lord Lieutenant
The Duchess of Northumberland, as Lord Lieutenant, helped organise the visit. Photo: Ian Smith