Kate Middleton
Kate Middleton stepped out and looked cozy for a casual Friday outing. Pictured: Middleton visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on Nov. 29, 2017 in London. Getty Images/Eddie Mulholland

Kate Middleton had a busy week, so she enjoyed her well-deserved day off.

On Friday, the Duchess of Cambridge made an unofficial outing. Pregnant Middleton arrived at the King Cross St. Pancras underground station in her go-to-skinny jeans. She paired it with a checked Zara coat and an off-white turtleneck top. The royal mom kept her locks into a ponytail and revealed a fresh face with minimal makeup, People reported.

Middleton complemented her ensemble with black suede boots. She also accessorized with an oversized clutched handbag by Mulberry similar to Meghan Markle's who was making her royal debut at about the same time.

The royal mom had a busy week. Middleton was spotted alone in most of her royal duties because Prince William is in Finland for an official visit.

On Tuesday, Middleton visited the Foundling Museum in London. There she met the families and children who enjoyed the museum's education and outreached program. The Foundling Hospital was established in 1739 by Thomas Coram. The center is intended for babies who are at risk of abandonment. It is the first children's charity and public art gallery in the U.K.

During the said visit, Middleton also shared her joy for Prince Harry and the "Suits" star's engagement. "William and I are absolutely thrilled," the Duchess of Cambridge said. "It's such exciting news. It's a really happy time for any couple and we wish them all the best and hope they enjoy this happy moment."

On Wednesday, Middleton stopped by at the Robin Hood Primary School in south west London to commemorate The Royal Horticultural Society Campaign for School Gardening anniversary. The royal mom of two put on her favorite leather boots with a Goodyear Welted Commando rubber sole and enjoyed gardening with the children.

She joined the kids in the outdoor learning area and sensory garden where they can explore and develop their knowledge and understanding of the environment. A number of tasks were given to stir the children's curiosity and stimulate their senses.

Middleton confessed that she loves gardening and she is passing this passion to her kids. "I've got such fond memories of being in the garden and being outside from my own childhood, and I'm sharing that with my own children, George and Charlotte, at the moment," she said.

Later that day, the Duchess of Cambridge was spotted with her mom, Carole Middleton. The mother and daughter were seen leaving the Kensington Palace with Middleton at the wheel.

What can you say about Middleton's unofficial outing while Markle made her royal debut? Drop a comment below.