Alexandra Gamlemshaug Andresen (born 23 July 1996) is a Norwegian heiress.
She became the world's youngest billionaire at age 19 in 2016 and held the position of youngest billionaire on Forbes list for three consecutive years.
As of March 2019, Andresen is the world's second youngest billionaire and her net worth is estimated at US$ 1.4 billion (£1.048 billion).