Despite recently revealing his newborn son is sleeping “reasonably well,” it doesn’t seem like Prince William is having the same luck.

Prince William

After welcoming his third baby with wife Kate Middleton on Monday,  the Duke of Cambridge was back to his royal duties as he attended the Anzac Day Service of Commemoration and Thanksgiving at Westminster Abbey.

But while Wills was very chirpy as he greeted fans alongside Prince Harry and Meghan Markle outside, during the Church service the new dad was pictured struggling to keep his eyes open. Oh dear!

In a hilarious clip, Wills can be seen with his eyes closed and his head tilted forward, before quickly opening his eyes.

The video came just a few moments after he claimed his little one hasn’t been keeping him up too much, telling a royal fan that the newest royal was “in good form, luckily”.

“Sleeping’s going reasonably well so far,” he said. “So he’s behaving himself which is good news”.

But as he’s also dad to two-year-old Princess Charlotte and four-year-old Prince George, we don’t blame Wills if he was feeling a little exhausted.

Kate gave birth to their 8lb 7oz Prince Cambridge on Monday morning and showed him off to the crowds from the steps of the Lindo Wing of St. Mary’s Hospital.

And with the tot still yet to be named, more than 100,000 bets have been placed in the UK so far.

Recent odds predict Arthur as the favourite, while Albert, James and Phillip also strong contenders.

While he’s kept tight-lipped about the name so far, William did joke about the possibility of calling his son Jerry.

Speaking at the event, the Dean of Westminster joked that the royal baby should be named after New Zealand’s High Commissioner to the UK, Sir Jerry Mateparae.

To which the Duke of Cambridge responded: “Jerry’s a strong name”.