Remember that time Megan Fox had a baby and we didn't find out about it until a month after the fact?! Well, according to her hubby Brian Austin Green, keeping the birth so secretive wasn't the original plan!

In fact, he credits another famous face as the reason he and Megan were able to keep the news on the down low -- Reese Witherspoon! "She actually gave birth the day before us in Santa Monica and we were lucky enough to go in at like 2:30 in the morning to the hospital an nobody knew!" he explained on Ryan Seacrest's radio show.

Related Article: Is Reese Witherspoon Getting Back in the Recording Studio!?

"We got home and thought, 'this is unbelieveable,'" Brian continues. "Because we weren't expecting to be able to get away with it."

In case you forgot -- Megan gave birth to son Noah Shannon on September 27... which, actually is the same day Reese gave birth to her son Tennessee. Ummm... do I see some playdates in the future for these two?! Yes!

Do you think Reese is the reason Megan's baby news was so DL?!
Photos Courtesy of: Fame/Flynet