The 100 Women in Finance Gala Dinner was held in aid of Mentally Healthy Schools, which works in partnership with Heads Together, the charity spearheaded by the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex.
She concluded the speech by saying: "I look forward to hearing how your discussions will lead to proactive steps and to an ever more resounding commitment to mentally healthy schools, teachers and children".
Tonight the sparkling creations were the ideal counterpoint to the softness of Kate's blush pink gown, which was made for the royal by Gucci.
She then attended the 100 Women in Finance's gala dinner in support of her efforts to bring awareness to mental health in schools. Also, the royal's stylist needs a special mention, as it's his/her hard work that makes the Princess look chick all the time.
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'I was very naive, of really just how important particularly the early years are for children's futures, ' she said.
"It is therefore critical that we support them so that they can provide the best level of care for all children in their schools and communities". He helped out to mark becoming royal patron of charity The Passage.
The first few years of a child's life are more pivotal for social, physical and emotional development.
The Duchess of Cambridge wears a McQ Black Watch tartan coat as she arrives at the opening of the V&A Dundee Design Museum, in Scotland on January 29.