Bobby Brown has just been arrested on suspicion of driving under the influence ... TMZ has learned.
Law enforcement sources tell TMZ, Bobby was busted moments ago in Los Angeles after cops pulled him over for driving while talking on a cell phone.
We're told 43-year-old Bobby is currently in custody in Van Nuys jail.
Whitney Houston's ex-husband already has a DUI conviction on his record.
He was also arrested for battery in 2003 and again for a parole violation in 2004.
Story developing ...