Meet the world's 20 youngest billionaires according to the Forbes 2011 list.

Dustin Moskovitz (United States)
Age: 26
Net Worth: $2.7 billion

Dustin Moskovitz is an American internet entrepreneur who co-founded the social networking website Facebook. Moskovitz owns a 7.6 per cent stake in Facebook.

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Mark Zuckerberg (United States)
Age: 26
Net Worth: $13.5 billion

Mark Elliot Zuckerberg is best known for co-founding the social networking site Facebook.

It was co-founded by Zuckerberg and classmates Dustin Moskovitz, Eduardo Saverin, and Chris Hughes while they were students at Harvard University in 2004.

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Albert von Thurn und Taxis (Germany)
Age: 27
Net worth: $2 billion

The 12th Prince of Thurn and Taxis's name first appeared in the billionaires' list when he was just eight-years-old.

After his father's demise, his mother, Princess Gloria, a popular media personality, saved his fortune until he was old enough to officially inherit it.

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Scott Duncan (United States)
Age: 28
Net worth: $3.1 billion

Son of the late Dan Duncan, Scott Duncan is one of the youngest billionaires in the list.

After his father's death, Scott Duncan became one of the heirs of Enterprise Products Partners, a pipeline, processing and storage business.

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Eduardo Saverin (United States)
Age: 29
Net worth: $1.6 billion

Eduardo P Saverin is a Brazilian-born American internet entrepreneur and investor.

Saverin is one of four co-founders of Facebook, along with Mark Zuckerberg, Dustin Moskovitz, and Chris Hughes. He later parted ways with the company. However, he owns a 5 per cent stake in the company.

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Yang Huiyan (China)
Age: 29
Net worth: $4.1 billion

Yang Huiyan is the majority shareholder of Country Garden Holdings and one of the wealthiest people in Mainland China.

Her father Yang Guoqiang started the company Biguiyuan in 1997.

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Fahd Hariri (Lebanon)
Age: 30
Net Worth: $1.5 billion

Fahd Hariri is the youngest brother of Saad Hariri, Lebanese parliamentary leader. He owns a stake in family businesses in construction, banking and media sectors.

He serves on board of Beirut's Future Television Network. He runs a furniture design studio in Paris.

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Sean Parker (United States)
Age: 30
Net worth: $1.6 billion

Sean Parker is an American technology businessman and entrepreneur. He co-founded Napster, Plaxo, Causes, and Airtime. He was Facebook's founding president.

In 2006, Parker became managing partner at the Founders Fund, a San Francisco based venture capital fund founded by Peter Thiel.

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Ayman Hariri (Lebanon)
Age: 32
Net Worth: $1.5 billion

Ayman Hariri is the son of Lebanon's former prime minister, Rafik Hariri. Ayman has worked as an engineer at satellite consortium Intelsat.

He is a board member in the family-owned business, South African wireless carrier, 3C.

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Yoshikazu Tanaka (Japan)
Age: 34
Net worth: $2.2 billion

Yoshikazu Tanaka is a developer of a social networking service, GREE. GREE Inc was founded by Yoshikazu Tanaka in December 2004.

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Yusaku Maezawa (Japan)
Age: 35
Net worth: $1 billion

A self-made billionaire, Yusaku Maezawa founded online retail website, Zozotown in 2004.

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Oleg Bakhmatyuk (Ukraine)
Age: 36
Net Worth: $1 billion

Oleg Bakhmatyuk is the eighth-richest man in Ukraine. After Bakhmatyuk quit as deputy chief executive of gas giant Naftogaz, he invested in Avangard and Ukrlandfarming.

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Andrey Verevskiy (Ukraine)
Age: 36
Net worth: $1.1 billion

Founder of Kernel Holding, Andrey Verevskiy remained as chairman since September 2007. He was also the Member of the Ukrainian Parliament between 2002 and 2007.

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John Arnold (United States)
Age: 37
Net Worth: $3.3 billion

John Douglas Arnold is an American hedge fund manager, specialising in natural gas trading.

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Kostyantin Zhevago (Ukraine)
Age: 37
Net worth: $2.4 billion

Forbes magazine named Kostyantin Zhevago as the youngest multi-millionaire in Europe. Zhevago controls the 'Finances and Credit' group - one of largest companies in Ukraine.

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Xian Yang (China)
Age: 37
Net worth: $1 billion

A customs officer turned entrepreneur, he became a coke trader in 2000.

Later, he moved into coal production. His company Hidili Industry was listed in September 2007 in Hong Kong.

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Ana Lucia de Mattos Barretto Villela (Brazil)
Age: 37
Net worth: $3.2 billion

Ana Lucia belongs to one of Brazil's oldest and most distinguished banking families.

In 2008 the family's Banco Itau merged with Unibanco. She is one of the largest individual shareholders of Itau Unibanco Holdin.

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Fang Wei (China)
Age: 37
Net Worth: $1.3 billion

Fang Wei leads Shanghai-listed Fangda Carbon New Material, carbon products researching, manufacturing and marketing, which is the only manufacturer in China that has four plants to produce graphite electrodes.

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Serra Sabanci (Turkey)
Age: 37
Net Worth: $1 billion

Serra Sabanci is a board member and shareholder of the industrial and financial conglomerate Sabanci Holding and one of the directors of the Sabanci Foundation.

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Sergey Brin (United States)
Age: 37
Net worth: $19.8 billion

Sergey Mikhaylovich Brin alongwith Larry Page, co-founded Google, one of the largest Internet companies.