Wildor was born in 1972 in Eastwood, Essex, England. She received her professional dance training at both the lower and upper schools of the Royal Ballet School. She joined the Royal Ballet in 1991, was promoted to Soloist in 1995, then Principal in 1999. During her career with the Royal Ballet, she was most noted for her musicality, grace, intensity and personality. She resigned from the Royal Ballet in 2001 and now works as guest artist with various companies. Most notably she was cast in the West End theatre premiere of Susan Stroman's dance musical Contact. Wildor is the wife of former Royal Ballet principal dancer Adam Cooper.