Just from Wikipedia - no. Apparently in the 1960s there were at least two very young World champions - Diane Towler at age 19 and Eva Romanova in 1962 (she was 16). Also, Natalia Linichuk seems to have won her first medal at age 18. But certinaly Tessa is one of the youngest medalists ever.So then, the youngest medalist in dance would be--Tessa Virtue?