The couple has been living together in Aguilera's new Mulholland Estates mansion in Los Angeles, which she bought in April 2013 for $10 million, Us Weeklyreported.
Aguilera met Rutler on the set of her 2010 film Burlesque where he worked as a production assistant. When the movie debuted, Aguilera was reportedly in the middle of divorcing ex-husband Jordan Bratman.
The singer and Bratman wed in November 2005 and split in October 2010. They share custody of a six-year-old son named Max Bratman and, according to Us, the pair ironically finalized their divorce on Valentine's Day 2011.
Aguilera starred on The Voice for its first three seasons before taking a break in Season 4, when she was replaced by Shakira, to concentrate on her music career. Aguilera returned to serve as a coach on the reality singing competition's fifth season, but will once again have Shakira fill her shoes for the upcoming sixth edition.
Adam Levine and Blake Shelton have served as mainstay coaches onThe Voice since the show debuted in Spring 2011 on NBC, while coaches Cee Lo Green and Usher -- like Aguilera and Shakira -- have been taking turns on the panel in recent seasons.
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