The "Big Brother" host has revealed she came to know about the not-so-secret information when the couple lightly dropped the news on her, reported ET Online.
"Here's the truth of the matter. My husband (Leslie Moonves) and I saw George and Amal about three weeks ago, and they causally mentioned that they were expecting twins. And we were all like, 'Is it a secret?!" said Julie.
But the TV personality said George treated as if the news was no big deal and simply shrugged.
"We didn't feel right telling anybody," she said.
Earlier, the actor's mother, Nina Clooney had said that he will make a "great" dad.