She is the identical twin sister of Olga Arntgolts. Tatyana is 20 minutes older than Olga.
She and Olga are the daughters of Russian theatrical actors Albert Arntgolts and Valentina Galich.
Sister-in-law of Vakhtang Beridze.
Gave birth to her 1st child at age 27, a daughter Maria Zhidkova on September 15, 2009. Child's father is her now ex-husband, Ivan Zhidkov.
Has a niece named Anna Beridze (b.on August 15, 2013).