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The Duchess of Cambridge will join Andy Murray's mother Judy at a tennis workshop, as she carries out a series of engagements in the Scottish capital.
Kate is visiting three school-based charity projects in Edinburgh linked to causes close to her heart.
The final stop in the day will take her to Craigmount High School, in the west of the city, where Judy Murray will host a Tennis on the Road coaching clinic.
Judy founded the project in 2014 with the idea of increasing coaching capacity and growing the game at a grassroots level.
The programme has already delivered 17 separate roadshows, visiting different locations across Scotland each month.
Kate will join Judy and her coaching team for a demonstration workshop alongside parents, teachers and volunteers. A group of children will then join in for some activities to test the skills they have learned.
The meeting between Kate - a keen tennis player and fan - and Judy comes less than three weeks after Judy became a grandmother.
Andy's wife Kim gave birth to their daughter, Sophia Olivia, on February 7.
The Duchess - known as the Countess of Strathearn in Scotland - is said to be looking forward to her day of engagements in Edinburgh.
The royal household said the focus of the day is on the local partnerships between charities, communities and schools which deliver programmes and sporting activities for children and young people.
She will begin the day by continuing her work in support of the mental health of children with visits to two charities of which she is patron. Place2Be and The Art Room both have a presence in the Scottish capital.
Place2Be, which has been working in Scotland for 15 years, now works in 28 schools in some of the most disadvantaged areas of Glasgow and Edinburgh.
It provides in-school support and training to improve the emotional wellbeing of pupils and their families.
The Art Room, which put down roots north of the border in 2014, works with children to increase their self-esteem, self-confidence and independence through art.