EMMA ROBERTS  arrested for domestic violence, The ENQUIRER has learned.

Emma, 22, who starred as  “Nancy Drew” and is the daughter of Eric Roberts and is Julia Roberts' niece was taken into custody by cops after allegedly busting her BF Evan Peters in the nose.

According to Montreal law enforcement sources on July 7, police were summoned to Evan and Emma’s hotel room after a loud argument was reported.

Peters, who stars on FX’s “American Horror Story”, was observed with a bloody nose and Emma was promptly cuffed by officers.

One cop said Peters, 26, was also reportedly sporting a vicious bite mark on his neck.

The domestic abuse case was dropped when Peters refused to press charges against Emma. Reportedly, Emma and Evan smoothed out their differences and are back in “happy couple land” with both hard at work on "American Horror Story."