The ceremony took place Saturday evening at the Chateau des Conde in Vallery, France, the website said.
Sixty people were in attendance at the fete, which included dinner and a fireworks display.
The Oscar-winner told InStyle magazine she would "never, never get married again," but passions ran hot when the two met on the set of "Dark Tide."
"She has called him 'The One,' " said Sophie Dulac, president of the Champs-Elysées Film Festival, which the couple attended last month. "She's said she never expected to meet this Frenchman, to fall in love like she has."
The couple is expecting their first child -- a boy -- together early this fall, People magazine said. Berry is already mother to 5-year-old Nahla.
Berry was previously married to baseball player David Justice and singer Eric Benet. Olivier previously dated Kylie Minogue.