Tom, who is the co-founder of hard seltzer company Port & Pier, also shared a sweet post debuting his and Josie's relationship.
Among the photos were one of himself and Josie hugging, another of Josie in a tradies' shirt pointing proudly at a power point and another of her inspecting a whiskey barrel.
"Hasn’t been that bad so far @josiewerner_," Tom captioned the post.
Fans were ecstatic to see Josie and Tom go Instagram official but the sweetest comment came from George, who Josie briefly dated on the show.
"Amazing pair 🔥🔥 So happy for you guys! 😊," he penned.
In response, Josie wrote: "@sirgeorgathy Thankyou George ❤️❤️"
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In August, Josie and George confirmed that they were no longer together and confessed that though they're not romantically involved, they are and "always will be extremely close".
Since Josie is based in Sydney and George in Melbourne, distance also played a part in the split.
"Nothing has changed except for the romantic side of things and feelings. I consider the Dungeon Master to be one of my closest friends who I trust with my life. We talk most days and have had each others backs from day one and this is something that will always remain," Josie penned on Instagram at the time.