Ninette de Valois was a prominent British dancer and choreographer, born on June 6, 1905, in London. She is best known for founding the Royal Ballet in 1931, which became one of the leading ballet companies in the world. De Valois played a crucial role in developing ballet in the United Kingdom and was instrumental in bringing classical ballet to a wider audience. Throughout her career, de Valois created numerous ballets and trained many dancers, influencing the art form significantly. She was also associated with the Sadler's Wells Ballet, which later evolved into the Royal Ballet. Ninette de Valois passed away on March 8, 2001, leaving a lasting legacy in the world of dance.