According to reports, Avett hinted at the wedding during a concert in Baltimore. A source at the event stated that the rock singer flashed his ring to the crowd.
According to Us Magazine, the pair secretly married each other at a private wedding in North Carolina.
Reports also have it that the pair had maintained a very close friendship since they met at a concert in 2009.
Carpenter was married to "Dexter" co-star Michael C. Hall, at the time of their meeting.
The actress started dating Avett in 2013, soon as the latter split from his ex-wife, Susan.
Though the new love birds managed to hide their secret wedding away from the prying camera lens of the press, a source said that Avett hinted at the union during a recent concert in Baltimore.
He was reported to have “flashed his ring to the crowd!".