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."
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