While taking some time to himself on the beach Thursday, the dad-to-be was swarmed by adoring female fans.
And he didn't seem to mind.
As the ladies rushed the 54-year-old X Factor judge with cell phones in hand, asking him to pose for photographs, Cowell kept a smile on his face as he took photos with the bikini-clad group and chatted them up.
Then, he headed off to the ocean to hop on a jet ski in white shorts, a life jacket and shades.
Cowell and Silverman have been spending a bit of time in Barbados for their babymoon, getting spotted last week taking a romantic stroll on the shore together holding hands.
The music mogul even got some daddy training in when he stopped to talk to a baby girl while walking along the shore with his pregnant girlfriend.
Silverman is expected to give birth to the couple's baby boy in the coming weeks, but they're both keeping mum on what they've decided to name their first child together.
"I'm not going to say what it is yet, but I'm happy," Cowell told E! News about the baby's moniker in November. As for whether the name has any family ties, he replied, "You'll have to wait and see!"
Back in October, Cowell gushed over the idea of fatherhood, but admitted he's "not brilliant with babies."
"I never know what to do," Cowell told Parade. "But [once he's older] I think I'll be a good dad in terms of advice. And then I'll get to do all the things I want to do, like go to Disneyland or Universal Studios, teach him how to drive—I love all that."