It's a big day in the royal calendar when a new family member is christened, and Prince Louis' is no exception. And even though we saw plenty of our favourites attend the service at The Chapel Royal at St James's Palace in London, there were two very important people missing.
The Queen, 92, and Prince Philip, 97, may not be spring chickens anymore, but according to tweets from the Daily Mail's Royal Correspondent Rebecca English, the reason for their absence was not health related.
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"The Queen and the Duke of Edinburgh will not be attending today's christening. There's no health issue for the Queen. She was working flat out in Scotland last week and has got a busy few days in London with the RAF Centenary event tomorrow and #Trump on Friday."
"The Queen & Philip have just spent the weekend together in Norfolk. He is remaining there while she travels back to London today. Her decision not to attend was mutually agreed with William & Kate, while Philip clearly doesn't want to attend public events unless he really has to."
So is Queenie chucking a sickie so that she has an excuse to avoid meeting the controversial President of the United States later this week? Twitter seems to think so.
One user posted, "Is the #Queen avoiding #PrinceLouis #Christening to build up her pulling a sickie to avoid #Trump .Go for it Queenie ...." and another tweeting, "I personally would take all steps necessary to avoid having to meet with the boorish bozo."
The Queen isn't the only royal who has an awkward relationship with Donald Trump. Duchess Meghan is a passionate supporter of women's rights and labelled the President as "misogynistic" during an 2016 interview with The Nightly Show with Larry Wilmore.
"Yes, of course Trump is divisive. Think about just female voters alone, right? I think it was in 2012, like the Republican party lost the female vote by 12 points."
"That's a huge number, and with as misogynistic as Trump is and so vocal about it, that's a huge chunk of it. You're not just voting for a woman, if it's Hillary, just because she's a woman, but certainly because Trump has made it easy to see that you don't really want that kind of world."
And let's not forget when Trump tried to move in on Princess Diana following her divorce from Prince Charles...
It's certainly a plausible explanation, though both the Queen and Prince Philip have had some recent and legitimate health concerns.
The Duke of Edinburgh retired from his public royal duties last year and underwent hip surgery in April, though that didn't stop him from attending Harry and Meghan's wedding and driving a carriage around the grounds at Windsor Castle. Clearly, this royal is still making the most of his retirement.
As for Her Majesty, she's still recovering from a summer cold, which was the reason she was unable to attend a royal service at St. Paul's Cathedral late last month.
Let's see if she's "feeling better" by Friday...