Why Mike McRoberts and Sam Hayes will wear pre-loved clothes at NZ Fashion Week

It will be a very special show that closes New Zealand Fashion Week (NZFW) this year, one that sees some surprising celebrity models sporting outfits chosen from charity shops.

"This was all your idea, mind you, wasn't it?" Newshub Live at 6 presenters Sam Hayes says to her co-host Mike McRoberts.

"I didn't put my hand up for this - Mike put my hand up for me!"

Sam and Mike will be stepping out from behind the news desk - and out of their comfort zones - to strut down the NZFW runway on Sunday in support of Mercy Hospice. 

Despite the nerves, they're pleased to be putting their best foot forward for the cause, having both been involved with the charity previously.

"I've had a couple of friends go through the Hospice," Mike says.

"Anyone who's had anything to do with Mercy Hospice just knows what an incredible job they do, and the dignity and the compassion they bring to people's lives."

The show is set to shatter any expectations that second-hand threads can't be chic. It'll feature carefully curated couture from Mercy Hospice charity shops - and then some.

"I'm going to be wearing one of the dresses that I danced in on Dancing With The Stars," Sam reveals.

"I'm not going to say which one, but it's going to be sold afterwards, so someone can snap that up if they want to."

The DWTS  NZ 2018 champion admits she thought she'd tackled "all the terrifying things" during her dancing debut earlier this year, but she'll give this particular challenge one more nudge.

"I'm a bit worried now, because when you get down to the end of the catwalk, you're not going to cartwheel back or anything, are you?," Mike asks.

However, as it turns out, it's not Mike's first turn on the catwalk. He walked in last year's Working Style show "to rapturous applause", says Sam.

And while the pair swaps tips on pulling a 'Blue Steel', and how many poses to hit, they're excited to raise money for a "fantastic cause" - whatever the result.

"I'm just going to try not to fall over, and I'll be happy if I make it back to the other end!" says Sam.

The Mercy Hospice show will be will be held on Sunday, September 2, at 4pm at the ANZ Viaduct Events Centre in Auckland.

All proceeds from the show go to Mercy Hospice - tickets are available from iticket.