Alexia Knecht de Massy was born 21 September 2001, the second of four daughters of Donatella Knecht de Massy and K. Sébastien Knecht de Massy. She has one older sister, Christine, and two younger sisters, Vittoria and Andrea. As a great-granddaughter of Princess Antoinette of Monaco, Baroness of Massy, she is untechnically a member of Monaco's Princely Family.
She attends the private catholic school, L'Institut François d’Assise Nicolas Barré, along with her sisters and second cousins once removed (I think. Alexia's grandmother was a cousin of Camille and Alexandra's mothers) Princess Alexandra of Hanover and Camille Gottlieb. She should be in the Sixième year (equal to 6th grade in the US system)at the school. Her sister is a year ahead of her, Princess Alexandra is two years ahead, and Camille is three years her senior at the school.
As she is so young and not technically in line for the throne anymore with the death of her great uncle (Prince Rainier III) in 2005, her parents keep her and her sisters primarily out of the limelight. However, in the last few years, they have been seen out and about at family functions. In recent years, she has been spotted attending Princess Alexandra of Hanover's uncle's 2011 Wedding (behind Lynette Wittstock in beige), and attending the International Circus Festival of Monte Carlo in recent years.