Dressed in casual attires, Prince William and wife Kate Middleton goes incognito on Friday, Aug. 29, as they joined a huge crowd of train commuters. Joined by their dog Lupo, the royal couple was spotted at London's King's Cross without their one-year-old son, Prince George, as they return from a trip to their country house in Norfolk.

Wearing stylish frames and a cap, the Duke of Cambridge looked like an ordinary commuter as he dashed through a crowd in London with Kate. Just like her husband, the Duchess of Cambridge was photographed wearing a cap and plain clothes as she took a break from her royal appearances. Ditching her designer clothes, Kate wore a checked shirt and pair it with a brown jacket, and finished her casual ensemble with a pair of blue jeans.

"Commuters did a double-take as Wills and Kate, both 32, and their cocker spaniel returned from a trip to Norfolk on Friday," Mirror reports. "They were both casually dressed in jeans and baseball caps as they left their train and headed for a waiting people carrier."

Early this month, William took a job in the East Anglian Air Ambulance as a helicopter ambulance pilot and is set to begin his training to be qualified as a helicopter commander. The Duke announced recently that he will donate all his salary to charity as he takes the pilot post as his main job.

With his busy schedules, the Prince will still continue his royal duties with wife Kate Middleton who is off to Malta for her first solo trip. "This job will be the Duke's primary occupation but his roster will take into account the duties and responsibilities he will continue to undertake on behalf of The Queen, both in the United Kingdom and overseas," according to a statement released by Kensington Palace.

Representing Queen Elizabeth in Malta's 50th Independence Day celebration, the 32-year-old brunette will have a two-day royal visit in the exotic island. He Malta tour is set on Sept. 20 to 21 where she is going to be the guest of honour in the annual celebration.

For more info about Prince William and Kate Middleton check out:

Prince William & Kate Middleton First Autumn Engagement, Royal Couple Opening Oxford University's China Centre

Kate Middleton's Mom Accused Of Being A Social Climber, Prince George Not Seen By Relatives

Kate Middleton First Official Solo Trip: Details For Malta Revealed