Lara & Sam's Baby Joy!

Lara Bingle, Sam Worthington are expecting their first child. Photo: Splash

Lara Bingle and Sam Worthington are expecting their first child, multiple sources confirm to WHO in this week's cover story.

"Lara is just over three months pregnant," a close pal of the couple tells WHO. "They're both so excited."

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The couple, who have been inseparable since they started dating a year ago, recently told friends and family the exciting news about their expanding family.

"The pregnancy wasn't planned," says a friend of the couple. "It was just a really happy surprise."

Lara Bingle and Sam Worthington on the cover of this week's WHO - On Sale now!

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It's been a whirlwind year for Bingle, who told WHO in November that her romance with Worthington "was just on" from the moment they met through mutual friend Natalie Imbruglia.

"We go to the gym together, we eat together, we sleep together," Bingle later elaborated to Elle. "Since I've met him, we've probably spent a week apart."

'For more on Bingle & Worthington's big baby news, pick up this week's WHO - on sale now!''

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PHOTOS: Star Couples Who've Bared It All In Print Together