The services marked Meghan's first holiday appearance with her fiance, Prince Harry, as well as the first time the engaged couple was photographed together with Kate and Prince William.
For the chilly morning, which included a much-photographed walk up to the Church of St. Mary Magdalene Sandringham, Meghan bundled up in a $1,295 long camel wrap coat from Sentaler, a Canadian luxury brand she's worn four times before. Though she's a Los Angeles native, the 36-year-old actress filmed the TV series, Suits, in Toronto.
Meghan paired the chic jacket with a $1,5550 two-toned, suede crossbody Chloe Pixie bag and $800 tan over-the-knee Stuart Weitzman boots.
She finished off her look with a matching tan hat that wasn't quite a fascinator but did have a festive swirl that the Internet can't stop talking about, plus a pair of $6,000 Birks snowflake earrings that she's been photographed in before.
Kate looked just as lovely, covering her baby bump in a $3,560 tartan Miu Miu coat with a black fur coat and double row of gold buttons. The 36-year-old royal accessorized with all black extras, including a furry hat, stockings, block-heeled pumps and a clutch, plus drop-down gold earrings.
The Duchess of Cambridge has worn a series of amazing looks during her third pregnancy. Click through the gallery below to see more.