Diana on her website also reveals that she wanted to be a figure skater as a child. I wonder how the figure skater/dancer distinction is chosen, because many figure skaters (Katia Gordeeva for example) started out as dancers and vice versa.
Another vice versa was Nina Ananiashvili. From her site's biography:
Because Nina was often sick as a child, her parents decided to enroll her in figure skating lessons in order to improve her health. By the time she was six years old, Nina was a ranked skater, and at ten became Georgia State champion in the junior division.
But also at age 6:
In 1969, Ananiashvili entered the Georgia State Choreographic Institute. Tamara Vykhodtseva was her first teacher there. The great Vakhtang Chabukiani also took little Nina under his wing. Her progress was so impressive that it drew the attention of teachers from the Moscow Choreographic Institute, who convinced her parents to allow Nina to continue her studies there.
One wonders what Katherine Healy might have become had she succeeded in joining ABT. The skater/skating choreographer was a principal dancer in three European companies.