Hounsou's rep tells the news source that the couple has, "officially separated after five and a half years."
The actor, 48, reportedly met Simmons, 42, in February 2007 after her split from hip-hop mogul Russell Simmons. Though Hounsou and Kimora Lee Simmons were not legally married, she described themselves as "kind of" engaged in a 2008 interview with People.
They have one child together, 3-year-old son Kenzo Lee Hounsou. Simmons has two children from her marriage with Russell Simmons: Ming Lee Simmons, 12, and Aoki Lee Simmons, 10.
Click through to look back at photos of Kimora, Djimon and their kids from throughout the years ...