Sources tell the entertainment news show that Evan, 26, put a ring on it over the holidays in New York City before the couple jetted off to London for a New Year's celebration.
Emma, 22, was spotted wearing the pink gold and diamond sparkler as she headed to New Orleans to film episodes of American Horror Story: Coven.
The couple, who have been dating since 2012, reportedly hit a bit of a rough patch in July of last year when a police report was filed over a domestic dispute between the two, which resulted in Emma's arrest after cops discovered a bloody-nosed Evan who also appeared to have a bite mark.
Emma and Evan have since resumed their low-key profile.
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