Andrea Casiraghi , 30 , is the eldest son of Princess Caroline and her second husband , the late Stefano Casiraghi . He is currently fourth in line for the throne of Monaco . Tatiana Casiraghi ( née Santo Domingo ) made Forbes ' 2015 World 's Billionaires list at number 847 . The 31-year-old socialite inherited $ 2.2billion from her grandfather Julio Mario Santo Domingo , former owner of the Bavaria beer brewery , in 2011 . Mr and Mrs Casiraghi , who wed in 2013 , have a son , Sasha , who turns two this month , and are expecting their second child this summer .
Andrea Casiraghi , 30 , is the eldest son of Princess Caroline and her second husband , the late Stefano Casiraghi . He is currently fourth in line for the throne of Monaco . Tatiana Casiraghi ( née Santo Domingo ) made Forbes ' 2015 World 's Billionaires list at number 847 . The 31-year-old socialite inherited $ 2billion from her grandfather Julio Mario Santo Domingo , former owner of the Bavaria beer brewery , in 2011 . Mr and Mrs Casiraghi , who wed in 2013 , have a son , Sasha , who turns two this month , and are expecting their second child this summer .