While Prince William may have suffered a few sleepless nights courtesy of his newborn daughter Princess Charlotte, the young father is now looking to go back to work.
The future king will have an early start as he reports for duty at 7am at Cambridge International Airport, for his first day in his new job as a pilot with the East Anglian Air Ambulance (EAAA).
The former RAF search-and-rescue pilot will now take on the often perilous duty of embarking on often hazardous missions to remote regions to reach critically ill members of the public that other emergency services cannot reach.
Jeremy Mauger, a doctor on the EC145 helicopter the Duke will be co-piloting, said it is a very rewarding job.
"Our crew, particularly the pilots, are fantastic and we are looking forward to working with the Duke," Mr Mauger told Mail online. "They fly in very challenging conditions and land in tight spaces, such as a sports field or busy dual carriageway."
The Duke will be on a six-strong team on a roster of day and night shifts, which last nine and a half hours. The nature of the job means he could be called out on an emergency in all weathers, during the night and if necessary he might have to skip Christmas dinner if he receives a call on Christmas day.
And there'll be no chats with the missus while he is on call-outs, as mobile phones must be switched off during rescue flights.
Kate, who has spent the summer with her husband at their Norfolk home since the birth of Princess Charlotte, has previously said the dangerous nature of the missions concerns her and she fears for her husband's safety every time he goes up in a helicopter.
However, Royal aides have stressed the Duke 'doesn't want any special treatment' and says he is there 'to do a job'.
Prince William will continue to carry out official engagements, but does regard the role as a full-time job.