Given that the average age of a billionaire is 63 years old, the
world's youngest members of the club stand out for their age alone.
At 19, Alexandra Andresen
isn't old enough to drink legally in the U.S., but she's entered the ranks of
the world's wealthiest thanks to a $1.2 billion inheritance, according to
Forbes Magazine annual list of the world’s richest people. Her sister, Katharina, 20, is the
second-youngest billionaire in the world with an equal fortune of $1.2 billion.
The Andresen sisters are
unusual not only for their age, but also their gender, given females comprise
just 11 percent of the 1,810 billionaires on Forbes' list. They owe their
fortunes to their father's decision in 2007 to transfer a 42 percent stake in
their family's private-investment firm to each of his daughters.