Kate Middleton in tweed costume for mental health in schools

Kate Middleton smiled as she arrived at a special event that highlighted how mental health issues are being addressed in our schools.

Images show the royal coming out of a car and smiles warmly at the crowd gathered in front of the Mercers' Hall, in central London.

In the clip, she is greeted by a woman at the entrance to the room.

The three-year-old mom shone in a navy tweet skirt and a matching blazer combo, which would be Chanel's.

This sophisticated blazer was paired with an eyelash skirt and black tights, a clutch and black suede pumps.

Tod's pumps, are touted online at £ 350, while the wallet appears to be Mulberry's.

Kate's pink and golden earrings seem to be from Kiki McDonough.

Experts are now ready to share how mental health modules are integrated into teacher education programs.

School leaders will talk about how they create a culture of well-being among young people.

The Duchess of Cambridge, along with Prince William, Prince Harry and Meghan Markle, coordinates the Royal Foundation, which is spearheading the conference "Mental Health in Education" and the Heads Initiative Together.

The campaign gives UK schools free access to hundreds of the highest quality mental health resources and helps teachers support the mental health of their students.

Kate Silverton, BBC news reader, organizes the feature, which contains excerpts from inspiring speakers.

In the United Kingdom, about one in ten children are affected by mental health problems.

These include depression and anxiety, but 70% of children and adolescents with mental health issues have not benefited from appropriate interventions at a sufficiently early age, according to a study.

And Kate, who has three children, is determined to change for years.

Meanwhile, her husband will be visiting The Pbadage, a charity for homeless people today.

Prince William, 36, will be involved in lunch preparation and service and will hear about the Home for Good program, which, according to the charity, aims to reduce the number of people sleeping on the streets and becoming homeless.

Wills recently became the boss of The Pbadage, a charity that Princess Diana has already visited.

This comes as part of the Daily Mirror campaign which highlights the scourge of homelessness in Britain.

As part of the "Mirror the Street" campaign, our reporters and photographers are addressing people who sleep on the streets and those who help them in 20 cities across the country.

Restless sleep has doubled in the last decade.