Joining the Royal Ballet at the age of 13, Ukrainian Sergei Polunin became their youngest ever principal dancer when he was 19, but in January 2012 he took the dramatic decision to walk away... Read allJoining the Royal Ballet at the age of 13, Ukrainian Sergei Polunin became their youngest ever principal dancer when he was 19, but in January 2012 he took the dramatic decision to walk away from his classical ballet career.Joining the Royal Ballet at the age of 13, Ukrainian Sergei Polunin became their youngest ever principal dancer when he was 19, but in January 2012 he took the dramatic decision to walk away from his classical ballet career.