The Royal Ballet is a British internationally renowned classical ballet company, based at the Royal Opera House in Covent Garden, London, England. The largest of the five major ballet companies in Great Britain, the Royal Ballet was founded in 1931 by Dame Ninette de Valois. It became the resident ballet company of the Royal Opera House in 1946, and has purpose-built facilities within these premises. It was granted a royal charter in 1956, becoming recognised as Britain's flagship ballet company.

Dame Ninette de Valois was an Irish-born British dancer, teacher, choreographer, and director of classical ballet. Most notably, she danced professionally with Serge Diaghilev's Ballets Russes, later establishing the Royal Ballet, one of the foremost ballet companies of the 20th century and one of the leading ballet companies in the world. She also established the Royal Ballet School and the touring company which became the Birmingham Royal Ballet. She is widely regarded as one of the most influential figures in the history of ballet and as the "godmother" of English and Irish ballet.