Cyrus wasn't home when the 22-year-old broke into the place in mid-December and took "a large amount of personal property" belonging to her and her brother, the Los Angeles County district attorney's office said in a statement.
As part of the deal, charges of receiving stolen property and grand theft were dropped, L.A. Now reported.
Sellner, who was previously convicted of burglary and evading arrest in a separate case in Ventura County, had pleaded no contest to first-degree residential burglary in February.
Cyrus' home appears to be pretty attractive to criminals: It's been broken into at least twice before, according to L.A. Now.
At the end of May 2014, her $100,000-plus Maserati and jewelry were taken in an afternoon burglary while she was in Sweden on her "Bangerz" world tour. The car was found on a Simi Valley street days after the break-in and an Arizona couple suspected in the burglary and car theft were later arrested.
Nearly all of the items stolen in that incident were recovered, police told L.A. Now.
Tylor Morgan Scott, 19, and Naomi Charles, 21, took a plea deal in September, the D.A.'s office told L.A. Now, with him getting five years in state prison and her getting a year in county jail, plus four years' probation.
Cyrus, meanwhile, has been continuing "backyard sessions" in her apparently target-rich home environment, with the performances posted on Facebook to benefit her Happy Hippie Foundation, which helps homeless LGBT youth. The Happy Hippie Presents Backyard Sessions effort was launched May 5 with a performance pairing the "Party in the USA" singer with Joan Jett.
The most recent musical offering? An ode to Pablow, Cyrus' late pet blowfish. And she did it wearing her unicorn onesie.