Princess Caroline of Monaco on holiday with her husband Prince Ernst August of Hanover, their daughter, Alexandra (b. 2000) and Caroline's son Andrea Casiraghi (b. 1984). As the eldest male child, Caroline's brother Albert is heir to Prince Rainier. However, Monaco's constitution was changed in 2002 so that if Albert dies without children, the throne will pass to Caroline and then on to her children with Stefano Casiraghi.