Notorious B.I.G actor locked up for assault and battery

The guy who played Notorious B.I.G. got busted this weekend for an alleged domestic violence incident in front of his stepson ... Jamal Woolard was arrested Saturday night in Gwinnett County, GA after police responded to a call about a domestic dispute.

According to law enforcement sources ... a child made the call to cops ... and said, "Dad hit Mom."

38-year-old Woolard -- who played  Biggie Smalls in the 2009 biopic "Notorious" -- was booked for battery, cruelty to children, and simple assault.