Frédéric becomes the latest Arnault to enter the spotlight, thanks to a very public partnership with the actor Ryan Gosling. The elder Mr. Arnault bought TAG Heuer in 1999. Like his half-siblings from his father’s first marriage, Antoine (chief executive of Berluti, head of image and environment for the group, member of the LVMH board) and Delphine (executive vice president at Louis Vuitton, member of the LVMH board) and his older brother, Alexandre (executive vice president for product and communications at Tiffany) and younger brother, Jean (working in Louis Vuitton watches), Frédéric grew up with the company. Frédéric attended the École Polytechnique, France’s leading science and technology university (as did his father) — and ran a mobile payment start-up with a friend (sold after 18 months to the French investment firm BNP) .