The duo were photographed walking on a French beach, their first public appearance together since news broke that she was pregnant with Cowell's baby.
In late July, reports surfaced that the longtime bachelor was expecting his first child with Silverman, the wife of his friend, Andrew Silverman. Days later, Cowell was accused of adultery when Andrew filed for divorce from Lauren after 10 years of marriage.
When Cowell appeared at the Television Critics Association's fall previews to promote the new season of The X Factor, he evaded questions about the shocking news. "I appreciate the question. Unfortunately, I have to keep this, for the moment, private. It's just one of those things," he said at the time.
But earlier this week, Cowell said, "I'm proud to be a dad. It's something I hadn't thought of before, but now I know I feel good about it."