The successful candidate will have the Cambridge's hectic diary at their fingertips.
The duke, husband, future king and father-of-three has had an eventful life so far.
The couple are thought to have sent flowers to Irene, who is 83.
The Instagram snapshot is the first close-up to depict baby Archie and arrives along with new details about the upcoming christening.
Kate joins other royals like Prince Philip in receiving the honor.
Queen Elizabeth II met her newest great-grandson shortly after his birth.
Markle and Harry were spotted walking with Prince William and Kate Middleton from church.
The Duchess of Sussex presented Givenchy's Clare Waight Keller with the British Womenswear Designer of the Year award.
The kids belong to the sovereign.
It's a Duchess day out.
Queen Elizabeth II and Prince Phillip will not attend, Buckingham Palace said.
From abdications to refused proposals, the modern royal wedding has wormed its way into our media spotlight.
As it turns out, a member of the public marrying a royal has happened a fair bit in the past.
There were 16 kings of France called Louis before the start of the French Revolution in 1789.
The Duchess of Cambridge gave birth at the Lindo Wing of St. Mary's Hospital in London.
Prince William, Kate Middleton, Prince George and Princess Charlotte have a new family member.
The baby boy is the royal couple's third child and the fifth in line to the British throne.
It even offers afternoon tea delivered to your bed.
Prince Harry said his future wife is "hugely excited" to get involved in the commonwealth organization.