The 48-year-old "Monster's Ball" star sparked the rumours after she was spotted without her wedding ring when stepping out in Los Angeles with her son Maceo during the weekend, reported Aceshowbiz.
"It seems Halle and Olivier have finally hit the end of the road. They've weathered a lot of ups and downs in their relationship - but recently, Olivier has been completely MIA!" a family friend said.
The 49-year-old, French actor's scandalous temper is allegedly the reason for the rift between the couple.
"Halle is telling pals she worries that Olivier's runaway temper could put her kids at risk. They've just been delaying the inevitable split," the insider said.