Hilary Duff, What Were You Thinking? (VIDEO)

Good girl gone bad? The last person we expected to wear a politically incorrect outfit is Hilary Duff, but her controversial Halloween costume proves us wrong.

The “Younger” star donned a Pilgrim’s outfit, complete with black hat and bib, while new beau, trainer Jason Walsh, wore a Native American headdress and face paint at the Casamigos Halloween Party in Los Angeles.

Their costumes were met with backlash on social media, people taking to Twitter to voice their displeasure.

I can’t believe Hilary Duff looked at her boyfriend and thought “yes this costume is perfect and not offensive.”

— noahilistic (@NOAHKEEN) October 29, 2016

Duff realized the error of her ways and took to Twitter to make her apologizes, saying, “I am SO sorry to people I offended with my costume.”

I am SO sorry to people I offended with my costume.It was not properly thought through and I am truly, from the bottom of my ❤️sorry.

— Hilary Duff (@HilaryDuff) October 30, 2016

Jason Walsh apologized over Instagram.

I meant no disrespect. I only have admiration for the indigenous people of America. In hindsight I would not have made that decision. I apologize to anyone I may have offended.

A photo posted by JASON WALSH (@risemovement) on Oct 30, 2016 at 12:43pm PDT

This couple is not the first to apologize for wearing a culturally-insensitive Native American costume. Showing his support for those protesting the Dakota Access Pipeline, Hemsworth posted a photo on Instagram with the caption, “Last New Year’s Eve I was at a ‘Lone Ranger’ themed party where some of us, myself included, wore the traditional dress of First Nations people.”

He apologized for the costume, saying he was “stupidly unaware” of his the issue’s sensitivity.

Standing with those who are fighting to protect their sacred land and water. #nodapl #waterislife #mniwiconi @taikawaititi I would also like to take this opportunity to raise something that has been bothering me for sometime. Last New Year’s Eve I was at a “Lone Ranger” themed party where some of us, myself included, wore the traditional dress of First Nations people. I was stupidly unaware of the offence this may have caused and the sensitivity around this issue. I sincerely and unreservedly apologise to all First Nations people for this thoughtless action. I now appreciate that there is a great need for a deeper understanding of the complex and extensive issues facing indigenous communities. I hope that in highlighting my own ignorance I can help in some small way.

A photo posted by Chris Hemsworth (@chrishemsworth) on Oct 27, 2016 at 6:49pm PDT