Prince William set foot into an operating room Thursday morning at the Royal Marsden Hospital in London.
But fear not, the new father was not performing surgery; he was merely on hand to oversee a breast reconstruction procedure and the removal of a bladder tumor.
The Duke of Cambridge, who is also president of the Royal Marsden NHS Foundation Trust, visited the hospital to view a life surgery and watch the hospital's latest radiotherapy technology, the CyberKnife, in action.
Prince George's papa met with the facilities' surgical team, including Stuart James and Pardeep Kumar, who handled the operation. The Royal Marsden is one of the first in London to install the new model of the CyberKnife, which was funded entirely by the Royal Marsden Cancer Charity.
Both surgeries occurred in the Wolfson Surgical Suite, which was refurbished and re-opened in 2010 after a massive fire two years prior.
Prince William at the Royal Marsden. pic.twitter.com/OJC9ub6jz7? Peter Hunt (@BBCPeterHunt) November 7, 2013
The hospital tweeted about the Prince's visit, saying, "Prince William update: he's arrived, changed into scrubs and now he's viewing the first of the two operations, a breast reconstruction."
They added, "He also chatted with staff and shared a joke about the number of qualifications they have to get."
BBC reporter Peter Hunt also shared a picture of the young royal watching the procedures take place.
So the question is, did the patients know about their visitor while they were under the knife?
"Yes, full permission and consent was given by all patients," the hospital confirmed.