Prince William is always perfectly polished and poised when it comes to royal engagements.
The future King consistently seems to be on top form on his public outings and is a consummate professional when it comes to more serious outings.
But on one occasion, his demeanour slipped ever so slightly when he fought to keep his eyes open at an annual Westminster Abbey event.
The slip came in April 2018 when William made a surprise appearance at the Anzac Day Service of Commemoration and Thanksgiving at Westminster Abbey alongside his brother Prince Harry and then-future sister-in-law Meghan Markle.
You may also like Advertisement Advertisement Advertisement Advertisement William was caught on camera almost nodding off as he listened to the service - but with good reason.
Just two days earlier, he and Princess Catherine had welcomed their third child, little Prince Louis , at the Lindo Wing at St. Mary's Hospital in London.
No doubt operating on just a few hours' sleep, the royal appeared to drift off a few times, then waking back up with numerous blinks - a sure sign of a newborn parent.
Prince William struggled to stay away during the 2018 Anzac Day service (@ Getty Images)
Louis arriv...