Swiss multi-billionaire businesswoman Margarita Louis-Dreyfus, chair of French conglomerate Louis Dreyfus Commodities and owner of the Olympique de Marseille football team, is pregnant with twins, the company said Monday.

The 53-year-old widow of famous French businessman Robert Louis-Dreyfus, is pregnant with twin girls, due in early April 2016," Louis Dreyfus Commodities said in a statement.

"She intends to continue to exercise her duties as (non-executive) chairperson until the birth, take a brief break and return to work full time in late April," it added.

Louis-Dreyfus was born in Russia, but acquired Swiss nationality through a first marriage, before meeting Robert Louis-Dreyfus in 1988.

The couple married in 1992 and had three sons, before Robert Louis-Dreyfus, who headed Adidas among other companies before taking over the family business, died in 2009 of leukaemia.

His widow took over the company and the football team he had acquired and is now considered one of the richest women in the world, with an amassed fortune of $7.1 billion, according to Forbes.

Louis-Dreyfus's current partner is Philipp Hildebrand, 52, the former head of Switzerland's central bank and current vice president of US investment manager BlackRock.