She is the elder child of Bernard Arnault from his first wife, Anne Dewavrin. She has a younger brother, Antoine Arnault, as well as three half-brothers from her father's second marriage.
Since 2003, Arnault has been a member of the management board of the LVMH group, the first woman and youngest person to occupy that post.[13] She is also a member of the board of directors for Moët Hennessy and M6, as well as a managing partner of a wealth management company.
In 2008, Arnault was named deputy chief of the designer Christian Dior Couture, which she quit in 2013 to join Louis Vuitton as a director and executive vice president.[14][15]
In May 2014, Arnault started the LVMH Prize, an international competition for young fashion designers.[16][17] The objective of the LVMH group is to discover the talents and creativity of new designers – "It is necessary to recognize the talent and creativity, as well as the ways in which we can best help the growth of their business", she confirmed.[18]
In January 2023, Arnault was appointed as CEO of Christian Dior Couture, effective in February.[5][19] She was ranked 45th on Fortune's list of Most Powerful Women in 2023.[20]
Arnault married Alessandro Vallarino Gancia, heir to the Italian winemaker Gancia, on 24 September 2005.[6] They divorced in 2010.[6]
Arnault has 4 children – 2 daughters born 2010 and 2012, and 2 sons born 2013 and 2017. Her 2 children with French businessman Xavier Niel, she has briefly mentioned in an interview with Vogue, are named Elise and Joseph.[12]
^"Biographie de Xavier Niel" (in French). Challenges. Retrieved 25 May 2020. Le compagnon de Delphine Arnault, fille de Bernard Arnault, est le plus gros business angel français