The teenage horse rider who has become the world's youngest billionaire: Norwegian dressage competitor (with a cage fighter boyfriend) makes Forbes list of world's richest people aged just 19 

Alexandra Andresen, aged 19, a professional dressage competitor from Norway has been named the world's youngest billionaire after amassing a 1.2billion dollar personal fortune. The teenager is one of the daughters of Johan F. Andresen, who transferred his 80 per cent holding in Norway's biggest company Ferd Holidings to her and her sister in 2007. But despite her incredible personal wealth, Miss Andresen appears to be more at home with her horses and lives in Germany where she rides professionally.