In November 2019, Tatiana published a personal website containing an equestrian and country style blog.[5] In December 2019, Tatiana was banned from driving for six months by a Magistrates Court because of speeding-related offences. Tatiana has previously raced in The 2021 Magnolia Cup for a UK Charity.[7]
Her engagement to entrepreneur Alexander 'Alick' Dru, the son of Mr. and Mrs. Bernard Dru and great-great-grandson of Henry Herbert, 4th Earl of Carnarvon, from Bickham, Somerset, was announced in January 2022; the proposal took place during a vacation in Verbier, in the Swiss Alps.[8] The couple married at Winchester Cathedral on 23 July 2022.[9] The news that they were expecting their first child were announced via Instagram on 16 June 2023; the couple's daughter, Elodie, was born on 20 September 2023.[10] In October 2024, it was announced that the couple was expecting their second child.[11]
Her website and Instagram account state that she is a psychotherapist in training; she wishes to combine her knowledge of horses and somehow incorporate them into her methods of therapy.[5]
*Not Mountbatten or Battenberg by birth. Adopted the surname Mountbatten from his maternal line on abandoning his patrilineal Greek and Danish princely titles.