The 36-year-old Aussie actress revealed the exciting news in a fashion spread for Stellar magazine.
'I feel like myself again,' she told the publication. 'You spend so long at the beginning of the pregnancy mentally coming to terms with it and physically you've got stuff going on, too - but you're not showing.'
She went on: 'Then in the second half, it's like, 'This is a reality now, it's not just all in my head, I'm actually out there, literally, and I'm going to become a mother. It's quite lovely.'
Nicole still hasn't revealed any more information about her new arrival.
Congrats to the new mum!