The former consultant obstetrician who led the team that delivered Prince George will be made a knight commander of the Royal Victorian Order by the Duke of Cambridge today.
Sir Marcus Setchell, who delivered a number of royal babies over the years, could not contain his delight after George was born on July 22 last summer at the private Lindo Wing of St Mary's Hospital in central London.
Soon after the birth he spoke movingly about the infant, describing the Queen's third great-grandchild and future king as a ''wonderful baby, beautiful baby''.
Sir Marcus also looked after Kate when she was taken to King Edward VII's Hospital in London with a rare form of pregnancy sickness during the early stages of her pregnancy.
The consultant obstetrician was the Queen's surgeon-gynaecologist for more than two decades and recently retired.
Awards made under the Royal Victorian Order are in the Queen's personal gift and are bestowed independently of 10 Downing Street.
Also being recognised during the Buckingham Palace investiture ceremony is West Ham vice-chairman Karren Brady, awarded a CBE for services to entrepreneurship and women in business,
Ms Brady, a co-star of The Apprentice, broke into the male-dominated world of football as managing director of Birmingham City at the age of 23.