Born in
Copenhagen,
Denmark, he began training with the
Royal Danish Ballet at the age of nine. He later joined the company as an apprentice at the age of sixteen and was promoted to solo dancer at the age of twenty one. Kronstam dominated the Royal Danish Ballet's repertory for more than two decades, dancing over 120 roles, many of which were created, such as the role of Romeo in Sir
Frederick Ashton's
Romeo and Juliet (1955), the Husband in
John Cranko's Secrets (1956), Nilas in
Birgit Cullberg's
Moon Reindeer (1958), and the Prince in
Flemming Flindt's
The Nutcracker (1971). He succeeded Flemming Flindt as ballet master of the
Royal Danish Ballet in 1978 and was responsible for the planning and direction of the 1979
Bournonville Festival as well as for restoring Bournonville, and classical ballet generally, to the center of the company's repertory. He also was a noted teacher and coach. He retired as balletmaster in 1985 but continued to stage and rehearse ballets until 1994. == Death ==