Britain's Prince Harry, Duke of Sussex kisses his wife Meghan, Duchess of Sussex as they leave from the West Door of St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018 after their wedding ceremony.

Bernard Arnault, France's richest person and the chief executive and chair of luxury group LVMH, has called Meghan Markle's royal wedding dress "absolutely marvelous." But he is predisposed to praise the bridal gown because his company owns fashion house Givenchy, which made the dress for Meghan, Duchess of Sussex, who married Prince Harry on Saturday. It was designed by the label's artistic director, Clare Waight Keller. "I think the dress is marvelous and I think also it fits perfectly what the new princess represents: modernity, diversity and a sense of understated elegance and the result was absolutely marvelous," he told CNBC's Karen Tso at the Viva Tech conference in Paris on Thursday.

More than 29 million Americans watched the royal wedding at Windsor Castle in England last Saturday, according to Nielsen data, with 15 channels airing the ceremony. The measure is the number of people who tuned in when it started at midday local time (7 a.m. EST) and finished at 1:15 p.m. The fashion house was founded by Hubert de Givenchy in 1952 and its designs have been worn by famous names including Grace Kelly and former First Lady Jackie Kennedy. Asked whether Givenchy saw a "Gucci effect," or a big moment on social media, Arnault said: "I think Givenchy is a symbol of elegance since Hubert de Givenchy. You know, Hubert was friends with Audrey Hepburn so it's understated elegance and it's an elegance which is timeless. "So it lasts for a long time… We try to stay for the long run."

The official wedding family photo of the royal family from the wedding of Prince Harry and Duchess of Sussex, Meghan Markle. Alexi Lubomirski | The Royal Family