When it comes to the easiest ways to get rich, being born into a royal family must come pretty close to the top.
These fabulously wealthy individuals have huge inherited riches, often thanks to the country they rule having deposits of oil and other valuable natural resources.
Then there’s the ownership of palaces, castles, jewels and art collections.
Here are the 10 wealthiest, according to Celebrity Networth.
1. King Maha Vajiralongkorn
Two regal figures lead the way when it comes to the world's richest royals. The first is Thailand's King Maha Vajiralongkorn, whose estimated worth is a cool $30 billion. Most of his wealth is inherited in the form of real estate - he is one of the world's top ten landowners. He also has large billion dollar stakes in Siam Cement, Siam Commercial Bank and insurance company Shin Corporation. | AFP via Getty Images
2. Sultan of Brunei
The Sultan of Brunei, otherwise known as Hassanal Bolkiah ibni Omar Ali Saifuddien III, has been Sultan of the tiny Southeast Asian country since 1967 and the prime minister since independence from the UK in 1984. His huge wealth of around $30 billion is due to his country's large oil reserves. Being one of the world's few absolute monarchies, he essentially owns it all. | Getty Images
3. King Salman bin Abdulaziz Al Saud
Another head of a royal family with huge wealth due to oil is King Salman bin Abdulaziz Al Saud of Saudi Arabia. Salman bin Abdulaziz Al Saud of Saudi Arabia. The third oldest reigning head of state has ruled since 2015, and was also Prime Minister of Saudi Arabia from 2015 to 2022. He is worth around $20 billion. | Getty Images
4. Al-Waleed Bin Talal bin Abdulaziz al Saud
Another member of the Saudi royal family comes fourth with a fortune of around $17 million. Al-Waleed Bin Talal bin Abdulaziz al Saud's money comes from him being the founder, and 95 per cent owner, of the Kingdom Holding Company, a company with investments in companies in the financial services, tourism and hospitality, mass media, entertainment, retail, agriculture, petrochemicals, aviation, technology, and real-estate sectors. | AFP via Getty Images