According to the Guardian, the film will reflect Daneman's chronicle of Fonteyn's love life, including what the author suspected was an actual affair—rather than just an intense and passionate performance style—between Fonteyn and Rudolf Nureyev, who were dance partners when she was in her 40s and he was a good 20 years younger.
Fonteyn herself, who was born Peggy Hookham, published an autobiography in 1975; one reviewer described it as "guarded," and another as "a masterpiece of blithe self-censorship."
The film will be produced by British film compay Hogarth Pictures.