The Duchess of Cambridge will lead an online assembly for the Oak National Academy

The Duchess of Cambridge, Kate Middleton, wore a new printed yoke midi waisted dress by Marks and Spencer

The Duchess of Cambridge will speak about the importance of children's mental wellbeing in a pre-recorded message to be played during the assembly hosted by the Oak National Academy. The theme of her assembly will be "spread a little kindness". The assembly will be live on the Oak National Academy website at 11am tomorrow (Thursday 18th June).