Emma Roberts' film credits include "Aquamarine," "Nancy Drew" and "Scream 4."
TMZ said she was taken into custody early July 7 in Montreal after someone called police to report a fight in the couple's room and officers arrived to find Peters with a bloody nose and a bite mark.
Roberts was released hours later because her 26-year-old beau did not want to press charges.
The celebrity news website said the pair have since reconciled and are working together on the new season of "American Horror Story."
Swim Week Miami Beach 2014 [PHOTOS]