Brooklyn Decker is craving orange juice.

Brooklyn Decker

Brooklyn Decker

The 'What to Expect When You're Expecting' star - who is expecting her first child with tennis champion husband Andy Roddick - finds her desire for the fruity drink "weird" because it isn't something she usually enjoys.

She said: "My only weird craving -- it's not even weird -- is orange juice.

"I've never really enjoyed orange juice but it's my one craving."

The 28-year-old fashion model knows the sex of her unborn baby but she and her spouse are not planning to reveal the news - though she doesn't expect it will stay a secret for her entire pregnancy.

She revealed: "It's going to slip at some point I'm sure.

"But for now, we will see. So far we've kept mum about it."

Brooklyn feels "great" and lucky the pregnancy is going smoothly.

When asked by E! News how she felt, she added: "I feel great, luckily."

The mum-to-be first revealed she was pregnant two weeks ago when she posted a photo of her cradling her growing baby bump with the caption: "So this happened... #the3ofus @andyroddick (sic)."

It was later confirmed by the actress' representative that the baby is due in autumn.

The spokesperson said: "I'm happy to confirm Brooklyn and Andy are expecting a new addition to their family in the autumn of this year."