United Kingdom, Oct. 12 -- Catherine, Princess of Wales and her daughter Princess Charlotte were spotted on the London Underground over the weekend.

The 44-year-old royal and her middle child took seats in the carriage of an Elizabeth line train through central London on Saturday (10.10.26), with their security detail spotted close by, and they took time to speak with members of the public before they alighted at Tottenham Court Road station.

A source told Britain's HELLO! magazine: "They spoke to members of the public sitting across from them. They had security with them and Catherine held Charlotte's hand getting off at Tottenham Court Road.

"The security didn't make it obvious they were there and they tried to make it as 'normal' as...