Is this the real face of Anne Boleyn?

She has never believed that the labelled sketch by Holbein actually shows Boleyn because, over the years, questions have arisen regarding certain details such as: the sitter’s informal dress, the name being inscribed in an 18th Century hand (long after Boleyn’s death), and the light-coloured hair and full chin, when there are references to her having dark hair and a thin neck.