Dannii Minogue Dannii Minogue

X-Factor judge Dannii Minogue is pregnant with her first child, Reuters reports.

Minogue, younger sister of Kylie Minogue, and her boyfriend, former rugby player Kris Smith, are "very excited and can't wait to start their family in 2010," her rep said.

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"Woo hoo I'm gonna be a mummy!" Minogue tweeted Wednesday.The 38-year-old singer and actress also serves as a judge on Australia's Got Talent.