"We also ended up having baby girls at the same time so we were bound to be great besties," Ms Usmar said.
The duo said they entered the New Zealand show because they both loved to cook.
"I love to do exciting, new, interesting, fun, stupid, crazy things, so having a passion for food, and eating, I thought, 'yeah this is for me and my bestie'," Ms Lyall said.
She said the women were both "really bossy" in the kitchen, which could be good viewing for audiences.
"We both like to be in charge but we also like to have fun. We have a lot of laughs. We laugh loudly and don't tend to get upset."
They said they were excited to see themselves on TV.
"We're really looking forward to seeing the show and seeing people's reaction," Ms Usmar said.
Both women said they had been hooked on the Australian version of the show and had been "fans from the start".
"We love it. We find it so entertaining and good to watch. It's great to see what we're in for as well now that we're part of the New Zealand show."
The show will be hosted by chefs Ben Bayly and Gareth Stewart. The tasting panel will be comprised of Nadia Lim, Sean Connolly, Grace Ramirez and Robert Oliver.
Ms Lyall and Ms Usmar will battle it out in the instant restaurant round, where they will be featured on Wednesday, August 27.
