The former Miss Universe Australia, 28, announced the news on her Instagram on Thursday, with a sweet photo of her newborn and Miziner.
"Life has never felt more complete. Wow. 2.3.17 Our new little man.. ✨," she captioned the snap.
The couple are parents to Violet, two.
Finch and Miziner's parenting techniques caused headlines last year when it was revealed that Violet spends weekends with her grandparents.
“Every weekend (Violet) goes to Mish’s mum’s house and we get our weekend to ourselves,” she said at the time. “I think that’s incredibly healthy for the relationship.”
This article orginally appeared on WHO.
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