The 38-year-old is three months pregnant by her boyfriend, Kris Smith, 31, a former rugby league player.
“Woo hoo I’m gonna be a mummy!” she wrote on her Twitter page.

He followed Minogue’s message with his own Twitter posting: “Woo hoo I’m gonna be a Daddy.”

A spokesman for the X Factor star confirmed: “Dannii and Kris are very excited and can’t wait to start their family in 2010.” The baby is due in July.

Minogue’s pop star sister, Kylie, also responded to the news on Twitter, saying: “OMG OMG OMG Perfect!!!! So happy!!! A new Minogue!”

Rumours about the pregnancy began last week when the couple were spotted emerging from a hospital in Melbourne. However, Minogue did not confirm the news as she was yet to have a 12-week scan.

“Dannii had her 12-week scan this week and was given the results today with the all-clear to make an announcement,” the spokesman explained.