Duchess Catherine is to celebrate her 35th birthday (09.01.17) with her family at Anmer Hall in Norfolk, East Anglia.
Prince William and Duchess Catherine
The brunette beauty will be joined by her husband Prince William, 34, and their two children - three-year-old Prince George and 17-month-old Princess Charlotte - as she enjoys a quiet affair at their country mansion.
According to the Daily Mirror newspaper, they will be joined by Catherine's parents and Charlotte's godmother, Sophie Carter.
The Duchess of Cambridge is expected back to work on Wednesday (11.01.17) when she is to visit Anna Freud National Centre for Children and Families' Early Years Parenting Unit.
The brunette beauty - who is a patron of the organisation - will "find out" and learn more about their work with children under five years old at the special unit.
Kensington Palace's made the announcement on their Twitter account on Thursday (05.01.17), writing: "The Duchess of Cambridge, @AFNCCF Patron, will visit the Centre's Early Years Parenting Unit on 11 January (sic)."
And the palace has since retweeted a message from the charity about Catherine's pending trip.
The post read: "Our Patron, HRH Duchess of Cambridge will visit @AFNCCF to find out about our work with under 5s @KensingtonRoyal (sic)."
Catherine's visit is also set to "draw attention" to mental health issues among young children and how to intervene.
Another tweet from Kensington Palace said: "The @AFNCCF visit marks The Duchess' continued desire to draw attention to child mental health issues & the importance of early intervention (sic)."
Meanwhile, the brunette beauty has become a the patron of the Royal Photographic Society, and received the lifetime honorary membership for the educational charity, which promotes and supports those interested in the art form, after the official portrait pictures she took of her 20-month-old daughter Princess Charlotte were released.
As well as taking images of her three-year-old son Prince George cradling her youngest child as a tiny tot, Catherine - who is a graduate in the history of art - has previously released images of her family from important milestones over the years, which include Charlotte's first birthday, George's first day at nursery, and a series of pictures from their travels in South East Asia.