Kate Middleton is speaking out about a cause very close to her heart. The royal mom visited Roe Green Junior School in London on Tuesday, where she met with students and teachers, taking part in a lesson designed to help support children’s mental health and well-being. Upon her arrival, Princess Kate — who wore a Seraphine cornflower blue dress and coat by Sportmax with a Tanzanite Pendant Necklace and matching earrings by G.