Carly Mallenbaum

USA TODAY

It's that time of year when celebrities apologize for their offensive Halloween costumes.

So, who's immediately regretting her choice of holiday wear this year? That would be Hilary Duff, who attended the Casamigos Halloween Party Friday in Beverly Hills. The Younger and Lizzie McGuire star went out with her boyfriend, trainer Jason Walsh, dressed as a pilgrim and a Native American. She had on a short black outfit, and he wore a feather headdress and face paint.

Twitter didn't take too kindly to the look that many called "ignorant," "racist," and "out of touch," especially in light of Native American protests against the Dakota Access pipeline.

And so, Duff tweeted that she was "SO sorry" for offending people with her get-up. "It was not properly thought through," she said.

Walsh also posted that he "meant no disrespect" with his Halloween costume.