In an Instagram story, the star shared the name of her NY neighbour, Dieter Addison, before launching into a tirade.
The 30-year-old actor and mom apparently lives next door to a guy who's smellier, noisier, and messier than she can handle any longer, and she's decided a good, old-fashioned public call-out is in order.
Despite Duff's Instagram rant, the star told Today that she isn't too attached to social media.
According to a post on the New York blog Guest of A Guest, Hilary Duff and her party boy neighbor live in a high-end building on Wooster Street in New York City. "Really open to any advice you have. Umm.my apartment reeks. Seriously, what do I do?"
She called him out for allegedly keeping her up by "smoking cigarettes and weed all night long" in an Instagram rant on Tuesday night.
The former Disney star added: 'We know your parents pay your rent. "Have some respect for your neighbors who work hard to live in that building". Don't be a dick dude - put your trash down the shoot.
Next, Duff gave some background as to why this most recent incident was the proverbial straw that broke the camel's back.
The Younger actress went on to say that she hadn't a wink of sleep that night after a 15-hour work day because of Dieter's behavior.
She also appears to dox her neighbor, using his name in the Story.
Fans took to social media to support the star for calling-out her bad neighbour. His Instagram account is private.
"I know your (sic) still sleeping".
He also said her claims he doesn't work are false, and he does in fact work at his family's real estate office, and also works as an event coordinator and manager for musical artists.
The plot thickens, though.
The smell of her neighbor's smoking has now invaded Duff's apartment and caused her to have very strong feelings about his lifestyle.