Pregnant Kate steps out for the last time before giving birth to her third baby

The Duchess is due to give birth in the next few weeks, and the couple has continued their royal duties.

Prince William and his wife, Catherine, Duchess of Cambridge, are expecting their third baby in April 2018. With just a few weeks to go until the royal arrival, the Duchess has just completed her final royal engagement.

As reported by People, Catherine's last working day before she the maternity leave started was on March 22, when she and her husband had a full schedule with plenty of appearances relating to the Commonwealth.

These events came ahead of the Commonwealth Heads of Government Meeting in April, for which Queen Elizabeth II will meet with world leaders from around the globe.

Catherine stepped out in a button-down floral shirt, a pair of skinny jeans, and a cream colored coat that accentuated her growing bump. Her hair was hanging loosely about her shoulders, and she wore a pair of pearl drop earrings.

William kept his outfit simple, opting for a white button-down shirt covered by a dark grey blazer.

The couple started their day at London's Olympic Park, visiting SportsAid. They watched a wheelchair basketball game, and then met with athletes who are aspiring to compete in the 2022 Commonwealth Games.

Then they participated in a Commonwealth Quiz, testing their general knowledge alongside athletes and coaches.

Catherine and William then moved on to a community cafe in Clerkenwell, helping locals and volunteers to complete the meals being prepared for the Commonwealth Big Lunch.

Outside the cafe, 32 children from Chobham Academy waited to greet the Duke and Duchess. The couple were happy to stop and speak to the children, with 9-year-old Given Mkandwire asking the Duchess what her favorite book was as a child.

While he couldn't remember her actual answer to the question, he recalls her telling him “Harry Potter didn’t exist when I was little.”

William told a group of the children that while he hadn't been good at maths, his favorite subject was geography.