"She's around 10 weeks along," an insider told the gossip magazine.
To make matters a bit complicated, Silverman is still married to real estate mogul Andrew Silverman who is (or was) Cowell's close friend. But the future mommy is ready to leave her husband and start a family with Cowell.
"Lauren and Andrew have been unhappy in their marriage for some time, and their divorce has been in the works for a while," said the insider. "As their marriage deteriorated, she and Simon became close."
Hopefully Cowell's time spent mentoring youngsters on "The X Factor" has prepared him for fatherhood. Then again, he's never had to change any of their diapers. Good luck with that.