Fairytale ball with the world's most glamorous royals: Monaco's first family dazzle in frothy ballgowns and satin jumpsuits at spectacular charity event. The Monaco royal family pulled out all the stops for the annual Rose Ball in glamorous evening gowns - and some other quirkier ensembles. Princess Caroline of Hanover, 59, wore an intricate fishtail dress as she accompanied her brother Prince Albert, 59, to the celebrations at the Monte Carlo Sporting Club. Her daughters Princess Alexandra of Hanover and Charlotte Casiraghi also both stunned in statement outfits at the charity event last night - with the latter opting for a satin pearl-embellished jumpsuit and a sheer cape. Princess Alexandra, the only child of Princess Caroline and Prince Ernst August, wore a billowing nude dress in an organza fabric, and later removed the top half to reveal a bandeau style neckline. She chose natural make-up for the evening and wore her hair in pretty tousled waves. While her sister Charlotte Casiraghi, the daughter of Caroline and the late Stefano Casiraghi, an Italian industrialist, certainly wowed in her quirky ensemble. Charlotte paired the ivory jumpsuit with platform heels and a silver box clutch, while her sheer cape added drama. She finished off the look with minimal jewellery and her dark brown hair slicked back. Caroline's sons, Andrea Casiraghi and Pierre Casiraghi, also looked dapper for the occasion and sported traditional tuxedos. The couple took their 15-month-old twins Princess Gabriella and Prince Jacques to Switzerland last week to celebrate Prince Albert's birthday. The Rose Ball was first thrown in 1954 by Princess Grace of Monaco, the American actress who married Prince Rainier III of Monaco. The event is currently presided over by the Sovereign Prince Albert II and Princess Caroline of Hanover and the funds raised go towards the Princess Grace Foundation, which assists young artists.