Pregnant Duchess Kate shines in festive Miu Miu coat dress on Christmas Day

Duchess Kate is glowing!

The royal, who is expecting baby No. 3 in April, didn't disappoint in the fashion department for Christmas Day mass with the royal family at St. Mary Magdalene Church. Kate was all smiles in a green-and-red Miu Miu coat that was embellished with large, gold buttons and a black velvet collar.

She added sparkle to the look with her go-to Kiki McDonough Eden earrings while keeping the rest of her look simple with black tights and booties of the same hue. As for her hair and makeup, she kept it simple and fresh for the daytime event, going for her signature curls and some light blush on her cheeks.

She stood alongside a nervous-looking Meghan Markle as they curtsied in front of Queen Elizabeth upon her arrival at the church. Prince Harry could be seen adorably giving his fiancé a pep talk before the momentous occasion -- and it's clear from the photos that Meghan passed her curtsy test with flying colors.

Princess Charlotte and Prince George were nowhere to be found, and we're guessing they're being watched over by their beloved nanny.

Meghan looked just as stylish in a camel coat from Canadian luxury brand Sentaler. She kept the rest of her look simple with a hat, Stuart Weitzman boots and a Chloé handbag -- all in different hues of brown.

For more on the royals' Christmas, watch the video above!