Tatiana Santo Domingo has landed herself a spot on the 2015 World's Billionaires list as compiled by Forbes. The heiress, who is married to Monaco's Andrea Casiraghi, was ranked the 847th richest person in the world.
At 31 years old, Tatiana has an estimated net worth of £1.4billion.
Her main source of income is her inheritance from her grandfather's beer business, the publication reported.
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Tatiana Santo Domingo has an estimated net worth of £1.4billion
While Tatiana married her husband Andrea – who is currently fourth in line to the Monegasque throne – in 2013, the heiress knew wealth long before she became a member of the Monaco royal family.
Her granddad Julio Mario Santo Domingo owned Colombian brewery Bavaria before trading it for 15 per cent of SABMiller in 2005. When he died six years later, he left one-sixth of his inheritance to Tatiana and an equal amount to her billionaire brother Julio Mario Santo Domingo III, who is a DJ in New York.
Her uncle Alejandro Santo Domingo also inherited his share of the fortune and is now the public face of the family and continues to manage its money.
Andrea Casiraghi and Tatiana Santo Domingo welcomed baby Sasha two years ago
While Tatiana and her husband Andrea, who are currently expecting their second child, count Paris as their main residence, the brunette beauty is a US citizen as she was born in New York.
She chose to gave birth to first son Sasha in London, however, and it is widely speculated that she will do the same with her second baby.
Known in the fashion industry for her boho-chic style, Tatiana is one half of ethical clothing and accessories brand Muzungu Sisters, and counts fellow Italian heiress Margherita Missoni as her close friend.
Close friends Margherita Missoni and Tatiana Santo Domingo are both pregnant with their second child
Tatiana and Margherita, who is also pregnant with her second child, have been spotted showing off their baby bumps at recent Paris Fashion Week events. Now about seven months pregnant, Tatiana was pictured at shows by Valentino, Christian Dior and jewellery designer Sabine Ghanem.
She also supported her friend Margherita at the opening of a new Missoni store on Rue Saint Honore in Paris. The proud mum covered up her growing bump in a black top and trousers, while designer Margherita flaunted hers in a bodycon midnight blue dress.