Kate Middleton
Kate Middleton will return to her royal duties next week. Pictured: Middleton attends a Christmas Day church service at Sandringham on Dec. 25, 2015 in King's Lynn, England. Getty Images/Chris Jackson

Kate Middleton is already wrapping up her maternity leave.

The Duchess of Cambridge has been on a maternity leave in the past six months ahead of Prince Louis' birth. Middleton is bound to return to the spotlight in her next engagement.

According to People, on Tuesday, Middleton will visit the Sayers Croft Forest School and Wildlife at Paddington Recreation Ground. This will mark the official end of the royal mom of three's maternity leave.

During the said visit, Middleton will learn how the school exposes thousands of urban students to nature. In addition, she will meet the children and participate in outdoor activities.

Initially, many thought that Middleton's first royal engagement after her maternity leave would be at the World Mental Health Day. Last year, she also took a brief leave after announcing her third pregnancy due to severe morning sickness.

Middleton made her return by hosting an event for the World Mental Health Day. She showed up in a blue Temperley London dress and flaunted her growing baby bump for the first time. On the said sighting, the duchess looked stress-free and was noticeably in her best condition.

In related news, Middleton "glows" in a footage shown in the "Queen of the World" documentary. The clip was captured earlier this year when she and Sophie, Countess of Wessex hosted an event and invited different designers from the Commonwealth to the Buckingham Palace.

Euphemia-Ann Sydney-Davis couldn't help but praise the Duchess of Cambridge. "You look fabuluous," she said.

Meanwhile, according to a body language expert, Middleton and Prince Philip get along well together. In one photo, the two royals can be seen staring at each other while laughing. Their movement suggests that they can be perfect partners in crime.

"These delightful poses suggest unexpectedly rich bonds between Kate and Prince Philip based on not just affection but also a shared sense of humour and fun," Judi James told Express.

"Her dimpled smile and softened eye expression show genuine affection but her fully opened-mouth laugh suggests she's finding Philips comments genuinely hilarious," James added. "The Prince looks in fine form here, pointing at little Charlotte and throwing an impish smile that involves raised brows and a wide eye expression."