Isabella, who will be carrying their unborn baby, also shared a heartfelt post on her own Instagram account.
"It’s time to be Mumma’s! We feel so incredibly grateful to be able to share this news. I am pregnant and Mo and I are expecting our little one in November," she wrote.
"It’s been a beautiful journey and I can’t believe we’re finally at this point. It wouldn’t have been possible without the amazing team at @monashivf so a huge thank you to them. I’m so excited for raise our child with you beautiful."
Moana and Isabella told Who that they hoped to fall pregnant by the end of the year and baby plans had been in the works since 2018.
"Some people are like ‘Ooh, I don’t want to jinx it’ but I’m just throwing all my positivity out there and letting my body do it," Isabella said.
Whilst Isabella is carrying their first child, Moana will carry the second.
"I want to carry at least two, Mo wants to carry at least one," Isabella explained with Moana adding, "I want three or four."