Law enforcement sources tell TMZ ... LAPD was called to Althea's home in the San Fernando Valley to check out a domestic dispute. We're told Althea wanted Benzino to get out, and he wasn't cooperating.
Responding officers tried to calm things down, but 'LHHA's' first couple of trouble didn't disappoint -- we're told Althea whacked Benzino in the head right in front of the cops. She was arrested and booked for misdemeanor battery.
Her bail was set at $20k, and we're told she bonded out early Monday morning.
Benzino admitted to being caught cheating on Althea just last May.