Mary also shared the photo, proudly writing: "My girls".
Fans have been treated to little updates on Summer, where Mary took to her Instagram Story to weigh in on whether she looked like her dad, in a side-by-side comparison of the two sleeping.
"Summer looks like Conor," she wrote, giving her followers the option of choosing yes or no.
The pair announced the arrival of their little one on Saturday, where she came "6 weeks earlier than planned".
Posting a photo of her and her new baby girl, Mary wrote: "@conorjcanning and I present to you Summer Elizabeth Canning. 6 weeks earlier than planned but she is doing such an amazing job.
"I feel like she’s already a daddy’s girl. Chanel can’t wait for a cuddle."
New dad Connor also shared the happy news on social media, and doesn't seem the slightest bit bothered to be outnumbered by girls.
"Welcome to the world Summer Elizabeth Canning. Just like your Mum you know how to make an entrance. You surprised us 6 weeks early while your daddy was away working in Sydney!
“The world is already a better place now that you are in it. We love you," Conor wrote in his post.
The couple first announced their pregnancy last year in a sweet Instagram post, where Conor revealed that their family "can't wait" to meet their little one.
"We can’t wait for the newest member of our little family. @maryviturino18 and I are over the moon and Chanel is very excited to be a big sister," he penned.
The two have come a long way after meeting on the third season of Bachelor in Paradise, where Mary, who first starred on Matt Agnew's season of The Bachelor, went on to meet "Cleanskin" Conor in paradise.
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