The 22-year-old confirmed that her first baby with fiancé Thomas Cohen will be a boy, adding that her father Sir Bob Geldof was overjoyed to finally welcome a male to his immediate family.
"Oh my God, he was so happy, especially as I'm having a boy. The poor man's been surrounded by women up till now," she told Hello magazine. "I knew he would be happy but I didn't realise how over the moon he would be.
"He's always been very supportive of me but he was really overwhelmed and emotional... He told us we must never break up; that we must make our child happy, get married and be together forever."
Peaches also declared that her due date of April 24 happens to be the birthday of her late mother Paula Yates, who died of a heroin overdose when she was 41 years old.
"It was amazing for me when they told me that, very emotional and touching and just really beautiful. I was so happy," she said. "I feel like it's a little wink from my mum; her way of sending a message to let me know that she's watching over me and my baby."
The publication's exclusive interview featured the first picture of Peaches sporting a baby bump, which she also posted to her Twitter.
> Peaches Geldof buys house following pregnancy news