She was born in 1947 to Princess Antoinette of Monaco and her partner Alexandre-Athenase Noghès during the reign of her maternal great-grandfather Prince Louis II, Prince of Monaco, himself the father of Elizabeth-Ann‘s maternal grandmother Princess Charlotte, Duchess of Valentinois Although Elizabeth-Ann was born out of wedlock, her parents married in 1951, thus legitimizing her, and placing her in line to the throne.
[citation needed] Elizabeth-Ann could represent the Sovereign Prince of Monaco at official events.
She was one of the four junior bridesmaids at the wedding of her uncle Rainier III with Grace Kelly.
She married firstly in Monaco on 19 January 1974 and divorced on 30 October 1980[5] Baron Bernard Alexandre Taubert-Natta (Geneva, 2 July 1941 – Geneva, 13 April 1989), and had one son: She married secondly in London on 18 October 1984 and divorced on 28 March 1985 choreographer[8] Nicolai Vladimir Costello a.k.a.
[10] She lost her place in the line of succession to the Monegasque throne upon the death of Rainier III, but remained a member of the Princely Family's "pool" of familial collaterals eligible to be selected for the Crown in the event of the extinction of the descendants of Prince Rainier.