Actress Eva Mendes has blamed her aversion to airport security scanners for sparking a false pregnancy rumour.

The Hitch star was recently rumoured to be expecting a baby with her actor boyfriend Ryan Gosling, but the gossip was dismissed as untrue by her representative.

Mendes has now revealed her decision to avoid walking through full body scanners at the airport sparked the rumour.

She tells U.S. Tv host Ellen DeGeneres, "It's so ridiculous. It all started because I didn't want to go through the scanners at the airport. You know those X-ray scanners, which are really creepy? They basically see you naked. And not only that, but there's a radiation aspect to it. So I always opt out. I always ask for a personal pat-down... (They thought) that was good enough reason to say 'Hey (she's pregnant)'."

When DeGeneres pressed about whether there was any truth to the pregnancy rumour, Mendes replied, "Oh God! No, no no!"