She has also embraced only using cruelty-free and organic skincare and makeup. Her hair and makeup is booked for the big day and she has taken inspiration and tips from her long-time hairdresser, Auckland CBD-based Chloe Zara.
All eyes will be on her beaming smile as Cullen is having her teeth straightened. In a world overflowing with "influencing", Cullen has signed up with Invisalign as an ambassador.
Preparations for her bridal party of four, netball alumnae, Tuāinē Keenan, Phoenix Karaka, Kaity Alexander and Darrell Tapa'au, are also in train.
"Organising my bridesmaids from Sydney has been a breeze as they are really helpful and willing to lend a hand wherever they can. I'm quite lucky as all my bridesmaids are around about the same size as me and we all wear size 10 shoes. I also ordered all the bridesmaid dresses off the rack in the same size as they are quite a relaxed and easy fitting dress."
She is having her own dress custom-made but is keeping the designer and the look a secret until her big day.
Cullen is loving life in Cronulla and says living close to the beach is a dream.
"I have come to realise Sydney is huge and the traffic is pretty similar to Auckland. We have a great little support crew here and have found our favourite little spots to eat and shop so it's all coming together nicely."
The couple have two bulldogs, Ella from Auckland and a new male addition, King Taco.
While settling into Sydney life, Cullen has put her own touch on their apartment and is a fan of Ikea furniture. She has decluttered the five full suitcases she took to Sydney and is selling her clothes on Instagram.