Pierre Casiraghi biography in the spotlight Pierre Rainier Stefano Casiraghi, or simply Pierre, the youngest son of Princess Caroline of Monaco and Stefano Casiraghi, and the grandson of Prince Rainier III and Grace Kelly, was born on the 5th September 1987 at Princess Grace Hospital Centre.
Princess Caroline stays out of the limelight and rarely talks to the press, but her philanthropy, elegance and fashion sense speak louder than words. She is known to the public as a royal with style, poise and generosity.