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Popular media personality Fifi Box warmed the hearts of Australians when she recently revealed she was going to be a mum.

But she stopped short of naming her child’s father, a mystery man she had been dating for a year.

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Now New Idea can exclusively reveal the baby’s dad is Australian Ironman legend and Olympian-turned-businessman Grant Kenny.

Multiple sources have confirmed the surprising revelation to New Idea, including the fact the pair have been secretly dating since last year.

An industry insider tells New Idea exclusively:

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“Fifi and Grant were very surprised when they found out about the baby but have both welcomed the news with excitement.

"Because it was unexpected I think they’re probably still in shock and are just taking it in their stride, one day at a time.”

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