Kate wore an icy blue Alexander McQueen coat dress and a matching hat from Sean Barrett. When she first went on maternity leave in March, it was with the expectation that she would still attend family and other significant events despite her leave.
Kate is now in the middle of maternity leave for Prince Louis and hasn't yet returned to full-time royal duties.
"Her father, his Majesty King George VI, was one of the founder members of the Royal Air Force".
Come Saturday, all eyes will be on her sister, Kate, who will join Meghan in cheering on Serena Williams. In June, she was spotted alongside the rest of the Royal family at the Trooping of the Colour, the Queen's birthday parade. Kate looked happy and radiant following Prince Louis' christening, which took place at the Chapel Royal at St James's Palace on Monday afternoon.
She's expected to make her official debut back into the workforce in September, however.
Meghan channelled the Duchess of Cambridge with nearly matching shoes - a nude pointed-toe pump and held a little clutch in her hand.
The duchess wore one of her tried and true favorite brands, Alexander McQueen, marking the third time in a row that she has worn McQueen to her children's christenings.
And amid turmoil in the Cabinet and her Government, Mrs May delivered a reading at the service, Hebrews 11:32-12:2, with the head of the RAF Air Chief Marshal Sir Stephen Hillier also taking to the lectern.
Kate debuted a pale yellow version of the dress at Prince Harry and Meghan Markle's wedding on May 19 and wore mint green or robin's egg blue version of the coat dress at the RAF 100th anniversary celebration.
Royal experts have continued to draw comparisons between the two women, ever since Kate and Prince William announced their engagement in 2010.
Attending the RAF 100 ceremonies was especially poignant for Kate, as she is the Honorary Air Commandant of the Royal Air Force Cadets.
White gloves are a mainstay of the Queen's wardrobe, no matter what the weather, and while Meghan has yet to actually don any gloves (apart from leather ones in winter), at yesterday's christening she was carrying a pair that matched her olive Ralph Lauren dress.