. . . . "Nina Dobrev"@en . . "Lost Girls (The Vampire Diaries)" . . . . "The Sexual Awakening (novel)" . "Katerina Petrova (Bulgarian: \u041A\u0430\u0442\u0435\u0440\u0438\u043D\u0430 \u041F\u0435\u0442\u0440\u043E\u0432\u0430; English: Katherine Pierce), is a fictional character from the hit TV series, The Vampire Diaries. Born June 5, 1473, Katherine is a doppelganger, descended from Amara and Tatia. She is an ex-vampire and the ex-lover to both the Salvatore brothers, Damon and Stefan. She first appears as Katherine Pierce in recurring flashbacks to 1864, which feature her romantic entanglements with the Salvatore brothers."@en . .