Penelope Cruz isn't hiding her pregnancy anymore.

She stepped out Monday wearing a see-through top that proudly displayed her bump at London's Heathrow Airport.

Last month, Cruz, 36 - who wed Javier Bardem this past July - announced to that she was four-and-a-half months pregnant. See more cute pics of Penelope's baby bump.

"Yes, it's true," Bardem, 41, recently told reporters while promoting his latest film, Eat Pray Love. "I am very happy."

Bardem wouldn't reveal whether their baby-to-be will be a boy or girl. And what about fatherly words of wisdom? "It is a little too soon for me to be giving advice," he said. "I don't know yet, but I will found out soon."