She is the daughter of an English father, Antony Moynihan, 3rd Baron Moynihan,and a Filipina mother. She is niece to Colin Moynihan, the current Baron Moynihan and head of the British Olympic Committee. Antonita was reared by her grandmother in York, England during her childhood years and later moved to the Philippines to accompany her father who became a close friend of former Philippine president Ferdinand Marcos and a successful food critique and restaurant owner in Manila in the 1980s. She is mother to actress Lexi Fernandez, who is a GMA Network contract artist.