Andrea Albert Pierre Casiraghi (born 8 June 1984) is the first of three children born to Princess Caroline of Monaco and Hanover and her second husband, the late Stefano Casiraghi, an heir to an Italian oil fortune. He is currently second in line to the throne after his mother, meaning that if the currently reigning Prince Albert II dies without legitimate children, then Casiraghi will most likely someday be the Prince of Monaco. As an heir to the Monegasque throne, it is likely that he will one day adopt the surname Grimaldi. His maternal grandmother was Grace Kelly.

Born on 8 June 1984 at 22:40 at The Princess Grace Hospital Centre in Monte Carlo, Monaco, Casiraghi was named after a childhood friend of his father's.

His godparents were his aunt Princess Stéphanie and his uncle Marco Casiraghi.

Andrea was six years old when his father died in a boating accident.

He has two younger siblings, Charlotte and Pierre, and a younger half-sister, Princess Alexandra of Hanover. Growing up mostly in France, he finished high school at the International School of Paris. Besides French, he is fluent in English, Italian and German. Following a period at Canada's McGill University, he eventually graduated in 2006 with a Bachelor of Arts degree in visual arts and international politics from the American University of Paris.

Known for his delicate blond good looks and athletic skills — he rides, skis, plays football and also guitar; he was included by People Magazine in 1999 in the Top 50 World's Most Beautiful People. In 2008 he was included as 10th on the list of the "20 Hottest Young Royals" as compiled by Forbes.

In 2006, he began to represent his mother at official functions most notably in August a visit to Manila to the charity Amade Virlanie Foundation, a socio-civic organisation of which Princess Caroline is patron. His girlfriend, Tatiana Santo Domingo, accompanied him on this visit. Santo Domingo has been dating Casiraghi since the beginning of 2005.

Since 2007, Casiraghi has been living in New York, according to Prince Albert II. Also in that year, Casiraghi unveilled his patronage of the Motrice Foundation, which funds research into cerebral palsy.

Source: Wikipedia