Posting their news to Instagram alongside a series of photos, the couple shared that their daughter was born at 8.36am this morning.
“Introducing Remie Lee Thurston,” Samantha wrote on Instagram.
“Born at 8.36am, weighing seven pounds and five ounces,” she added.
“We are all totally besotted and feeling very blessed.”
The former rugby league player announced their pregnancy news back in August last year.
“Our little surprise package! Joining us February 2019,” Johnathan wrote on Instagram at the time.
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The couple’s latest addition, Remie, is their fourth child together.
Johnathan and Samantha already have three daughters – Frankie, Charlie and Lillie.