It was the first time the Duke and Duchess of Cambridge and their three children have been seen together as a family of five.
Something about the not-quite-perfect hair 'do made Meghan more approachable-one of us, even. For her daughter Charlotte's christening on July 5, 2015, Kate wore a lovely white coat by Alexander McQueen and a white fascinator by Jane Taylor - a similar look by the same designers.
Royal commentators have drawn comparisons between the two women ever since Kate and Prince William announced their engagement. She's been playing it safe by keeping her looks simple.
And despite still being on maternity leave, after giving birth to Prince Louis only 11 weeks ago, it is understood that Kate felt it was important to attend Tuesday's celebrations.
Prince Harry has paid around $10,000 for a first edition "Winnie-the-Pooh" for nephew Louis' christening.
Critics noticed right away that Kate Middleton looked less than pleased to be standing so far away from Queen Elizabeth and the rest of the royals. According to the site, she also wore matching Manolo Blahnik suede pumps and a hat from Stephen Jones Millinery.
And perhaps most importantly, Van Custem's daughter Grace was a bridesmaid at William and Kate's 2011 wedding, where she was famously photographed holding her ears pouting atop the Buckingham Palace balcony.
At this point, it's safe to say that Kate Middleton has definitely noticed that Meghan Markle is giving her a good run for her money, at least when it comes to media attention.
The 16th-century chapel, which is not accessible to the public, is where Louis' four-year-old big brother George was christened in 2013.