The Teenager Who Has Become The World's Youngest Billionaire At 19

A horse rider from Norway has become the world's youngest billionaire after amassing a $1.2billion fortune at the age of just 19.

Forbes magazine has named Alexandra Andresen, a professional dressage competitor, on their list of people from around the world worth at least one billion dollars.

It is the first time the teenager and her sister Katharina, aged 20, have appeared on the list and they are ranked as the 1,475th richest people in the world.