We've learned his wife, Ilusion, filed today in L.A. County Superior Court.
The couple has been married for 16 years. They have two kids.
Ilusion is seeking joint custody of their kids, as well as child and spousal support.
She's repped by attorney Lisa Meyers.
Both Cesar and Ilusion say they "remain caring friends and are fully committed to the co-parenting of our two boys."