SJWs and Special Snowflakes immediately take to Twitter to voice their outrage and go into meltdown.
Hilary then wasted no time getting on her knees and blowing them with apologies.
Duff, 29, wore hot pants, fishnets and a black and white sweater with a pilgrim collar while boyfriend Jason Walsh wore face paint, a headdress and an elaborate outfit to a Halloween party in Beverly Hills on Friday.
Twitter users quickly blasted Jason Walsh for his offensive costume and Duff for approving it.
‘I can’t believe Hilary Duff looked at her boyfriend and thought ‘yes this costume is perfect and not offensive,’ one person wrote.
Another noted the costumes were particularly insensitive considering the contentious relationship between the Pilgrims and the Native Americans.
‘No @HilaryDuff Traditional dress is not a costume and you being dressed as a pilgrim proves to me how insensitive and ignorant you are,’ another Twitter user wrote.
Another person pointed out that the choice of costumes came at a particularly sensitive time – as protests are underway in North Dakota against the construction of a pipeline that could destroy thousands of miles of sacred grounds.
They tweeted: ‘On any given day this is disgusting but considering what literally JUST happened at #NODAPL this is especially evil.’
Amid the wave of criticism, Duff took to Twitter to apologize.
‘I am SO sorry to people I offended with my costume,” she wrote. It was not properly thought through and I am truly, from the bottom of my (heart) sorry.’
The couple’s appearance together at the Casamigos Halloween party on Friday night was their first as a couple.
The actress, who currently stars in Younger, only recently confirmed they were in a relationship with a picture of them kissing on Instagram.