Pregnant? Reality star steps out with a visible bump on show!

Could Nicole Richie be expecting baby number three?

The Simple Life star was pictured with an unusually rounded tummy as she took a stroll in Sydney, Australia earlier this week.

Although Nicole has not made any official statement about a third pregnancy, there's no denying a bump was on show as the star appeared at a racing carnival at Sydney's Rosehill Gardens wearing a pretty tunic-style dress.

Nicole and her husband, Good Charlotte's Joel Madden, have two children together, seven-year-old Sparrow and five-year-old Harlow.

Speaking in a recent interview about the possibility of more children, Nicole said she never plans ahead. "We didn't plan the first two, so it's not really up to us, I guess. We're just a go-with-the-flow… we've never done anything in traditional order," she revealed to Ryan Seacrest.

The family are currently splitting their time between Australia and LA as Joel continues his work as a judge on The Voice Australia, and Nicole admits she considers Down Under as a "second home."

We can't wait to find out if the rumours are true!