King of Dubai, Sheikh Mohammed bin Rashed & Crown Prince seen on London Underground tube train

The man seated on the right is His Highness Sheikh Mohammed Bin Rashid Al Maktoum, the Vice President and Prime Minister of the United Arab Emirates and Ruler of Dubai.

His co-rider seated on the left is his son, Sheikh Hamdan Bin Mohammed Al Maktoum, the Crown Prince of Dubai. 

This is a pretty big deal because this man, his family and associates built Dubai and of course, he's a billionaire. Londoners were graced with royalty as Sheikh Mohammed bin Rashid Al Maktoum, the ruler of Dubai, UAE Vice President and Prime Minister and his son, Sheikh Hamdan bin Mohammed bin Rashid Al Maktoum, Dubai Crown Prince took the popular London Underground tube today. 

Time and Forbes have put his father's wealth in excess of $4 billion, though note he gifted $10 billion in 2007 to set up the Mohammed bin Rashid Al Maktoum Foundation, which aims to help future generations develop sustainable solutions in the Arab world.

During their Tube ride, Sheikh Hamdan Bin Mohammed Al Maktoum appears to have taken a selfie with his father - and other Tube riders - and uploaded it to his Twitter, Instagram and SnapChat accounts.

Unlike normal traditional arab dress, the pair were dressed down casually for summer like many other Londoners enjoying the warmer weather.

Casually dressed in a white shirt and green trousers, Sheikh Mohammed was shown sitting down next to passengers on the tube train.  Sheikh Hamdan, commonly known by the affectionate nickname 'Fazza,' can be seen sporting a t-shirt.

A 17-second clip of his ride on the London Underground was uploaded to Twitter by  UAE-based daily al-Roeya. A Twitter user commented in Arabic that the occasion showed the ruler’s “humility.”

Back home, Sheikh Mohammed is more frequently seen driving around his emirate in a luxury white Mercedes G-Class, and is sometimes known to pull over and chat with the city’s residents.