The Oscar-winning actress is reportedly planning on marrying her French other half this weekend.
The couple became engaged in March 2012 and Halle is currently pregnant with their first child together, a boy. It's been claimed they are getting married this weekend, with those close to the pair not surprised. In June they attended the Champs-Élysées Film Festival together, with the event's president in no doubt they are meant to be together.
"She has called him 'The One,'" Sophie Dulac told People magazine. "She's said she never expected to meet this Frenchman, to fall in love like she has." Sophie has also been amazed by how happy Olivier seems. Although he has enjoyed relationships in the past, such as with singer Kylie Minogue, he seems different this time around.
"They seem truly in love." Sophie explained. "I've known Olivier very well and have never seen him like this."
The couple were seen taking a flight to Paris from Los Angeles this week, with Halle's five-year-old daughter Nahla with them. It's not known if they will tie the knot in Paris or continue their journey and hold the ceremony elsewhere.
This will be Olivier's first marriage and Halle's third trip down the aisle. She was previously wed to baseball star David Justice and musician Eric Benét.
Neither of the relationships ended well and the 46-year-old actress had always insisted she would never tie the knot again.
"I will never, never get married again," she said in 2007. "Actually it's just that now I've come to a place where I think two people can share their lives without the ring, without the piece of paper."
Halle was astounded to discover she was pregnant earlier this year and has called the baby "the biggest surprise" of her life.
Olivier, 47, confirmed they are having a boy at the Champs-Élysées Film Festival.