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Commuters in London may have thought they had boarded the wrong train today when they saw who was sitting with them.

Traveling on the tube, London's subway, were none other than Prince Charles, the man next in line to the British throne, and his wife, Camilla, Duchess of Cornwall.

Charles and Camilla are usually driven around London privately, though Charles's son, Prince William, and his wife, Kate Middleton, have vowed to be more accessible, even doing their own grocery shopping.

The Prince of Wales and his wife only rode the train for a one-stop photo op to celebrate the London Underground's 150th anniversary.

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Charles, 64, and Camilla, 65, spent a grand total of three minutes on the train, traveling on the Metropolitan line from Farringdon station to King's Cross, according to the UK's Telegraph. The trip was, according to British media, the first time the royals had traveled on the tube together and the first time Charles had been on the train since the 1970s, when he made another ceremonial appearance.

"Just one stop!" Charles said as they arrived at King's Cross, the UK's Guardian reported.

Despite their lack of experience, the pair managed to figure out how to swipe their "Oyster" fare cards in the turnstile to gain entrance, although they did have help in the form of a pre-loaded commemorative card.

Also helping Prince Charles and Camilla was a police escort keeping everyday passengers at bay, ensuring the royals each got a seat on the train for their short commute.