The 20-year-old boyfriend of Miley Cyrus is living with the teen U.S. pop sensation and her family in their California home, a source alleges.

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An unidentified source alleges the 15-year-old actress-singer, best known for her work on the TV series "Hannah Montana," is living under the same roof as her rumored love interest, former "Nashville Star" finalist and underwear model Justin Gaston, the New York Daily News reported Friday.

The source said the alleged living arrangement was approved by Cyrus' father, Billy Ray, who wanted to keep a close eye on the couple.

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"Billy Ray wasn't born yesterday," the source alleged. "He figures the safest path to take is to keep Miley and Justin on a short leash -- and under the same roof."

The rumors regarding the "Montana" star's love life follow her widely reported split from fellow singer Nick Jonas last year.

The Daily News said while Cyrus has been linked romantically to Gaston in the media, the singer has yet to confirm such reports.