How Princess Kate Is Celebrating Her 35th Birthday

Kate will be joined by Prince William and their children, George and Charlotte.

William and Kate's Anmer Hall home, which was a gift from Queen Elizabeth, is located on Her Majesty's Sandringham estate near the church.

Kate and William will also attend an event at Child Bereavement UK for families struggling with the loss of a loved one. Kate has been an outspoken advocate for mental health awareness and will continue to lend her profile to programs that support vulnerable children and adults in the coming year.

The year ahead is expected to bring substantial changes for William and Kate, who are likely to give up country life and make Kensington Palace in London their full-time residence. With Prince George turning 4 in July, and with the Cambridges’ royal responsibilities growing, the Cambridges have couple has been searching for a school for their eldest child.

While no official announcement has been made, George, the third in line to the British throne, will likely follow his father's footsteps and take a place at Wetherby School in Notting Hill, nearby Kensington Palace.

With Charlotte turning 2 in May, it is unclear if Charlotte will attend Westacre Montessori near Norfolk a few days a week, like George, or choose a school in London closer to the family's Kensington Palace base.

Kate also will be making decisions on whether to expand their family in the coming year. With Charlotte nearly 2, royal watchers are speculating whether Kate will add to her brood. The young mother is close to her two siblings. Pippa and James Middleton, and time will tell if she adds a baby brother or sister for George and Charlotte.

Kate will be at Pippa Middleton's side in May as she marries financier James Matthews. George and Charlotte are expected to play roles in the wedding. Middleton and Matthews are expected to tie the knot at the Middleton's family church, with a private reception following at the family's house in Bucklebury.