Halloween is here and, as usual, somebody has managed to opt for a culturally offensive costume. This time it's Hilary Duff and her boyfriend Jason Walsh, who apparently didn't get the memo that Native American dress-up is out of bounds. Still, at least they've apologised.

Hilary DuffHilary Duff apologises for offensive costume

The 'Younger' actress donned a sexy pilgrim outfit complete with fishnet pantyhose, while Walsh opted for red facepaint and a feathered headdress for his Native American costume. Unsurprisingly, Walsh's outfit (and the combination of the two) caused outrage across Twitter, with many taking them to be disrespecting the indigenous people of the nation.

Jason Walsh has since spoken out about the incident with an apology. 'I meant no disrespect. I only have admiration for the indigenous people of America', he said on Instagram. 'In hindsight I would not have made that decision. I apologize to anyone I may have offended.'

Hilary Duff has also expressed remorse for her outfit. 'I am SO sorry to people I offended with my costume', she told her Twitter followers. 'It was not properly thought through and I am truly, from the bottom of my [heart] sorry.'

People have branded the couple 'out of touch' with the cultural issues that are going on in the States at the moment, in particular the work on the Dakota Access pipeline at Standing Rock which threatens to put the Standing Rock Sioux Tribe's holy sites (and their water supply) at risk.

More: Shailene Woodley arrested during Standing Rock protest

Chris Hemsworth also came under fire after dressing up as a Native American for a 'Lone Ranger' themed New Year's Eve party, and recently opened up about his regret while expressing his support for the Standing Rock protestors. 'I was stupidly unaware of the offence this may have caused and the sensitivity around this issue', he said on his Instagram page. '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.'