She hosted a roundtable event on early childhood development, a topic close to her heart, on Thursday.
Kathy presented findings from the Royal Foundation Centre for Early Childhood.
Almost half of respondents said a person's early years affect their mental health later in life.
She welcomed Sajid Javid, Will Quince, early years sector representatives, and officials from both departments.
A childhood experience deeply influences how we thrive as individuals, as a community, and as a society.
We now have a huge opportunity and it shows there is a real desire from the public to bring this issue to the fore.
There is more we can all do - whether it be directly with a child or investing in the adults around them.
In June 2021, Kate hopes to raise awareness of the role of early childhood experiences in shaping society.
In Denmark, she learned more about Danish investment in early childhood development.