New Delhi: Kumaramangalam Birla ranks the eighth youngest billionaire in the world in 'Fortune' magazine ratings with $ 2.1 billion to his name beating Australian media tycoon Richard Li who is has $ 1.6 billion.

'Fortune' has compiled a list of 40 richest people under 40 years of age and Birla is the only Indian among the top 10 billionaires, according to a statement.

The list throws up another surprise, as many as 13 Asians make the grade with three billionaires from Japan, India and Hong Kong in the top 10 and baby Moghuls from China, 'Fortune' said in a statement.

The world's richest under-40 billionaire is Russian oil baron Mikhail Khodorkovsky with $ 7.2 billion followed by Swiss Ernesto Bertarelli with $ 4.7 billion.

Also, the only woman millionaire in the United States is "pretty woman" Julia Roberts with $ 145 million to her name while the lone woman outside the US who made it to the 'Fortune' list is Mexican Maria Asuncion Aramburuzabala with $ 1.5 billion.

"Today, mere millionaires stand no chance of making the list - it will take $ 136 million to just match Wang Yusuo (at number 40) while a $ 1 billion will only just scrape into the top 15," the statement said.

"And to be the youngest on the list will take some early saving, because 25-year old British entrepreneur Reuben Singh is already worth $ 151 million," it added.

PTI