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Simon Cowell has confirmed the sex of his unborn baby -- the music and TV mogul's girlfriend is pregnant with his son.

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Cowell let the news slip during a recent interview with news show "Access Hollywood" when reporter Shaun Robinson asked the dad-to-be if he would be strapping a baby seat into his Bugati sports car ahead of his first child's arrival.

He said, "Yes, of course he's got to learn how to drive very quickly."

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Robinson didn't pick up on what "The X Factor" boss said right away and asked the follow-up question, "Have you found out the sex of the baby yet?" prompting an embarrassed Cowell to respond, "I think I just gave it away, Shaun."

The interviewer replied, "You certainly did. Oh my gosh!"

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Cowell then added, "Everybody knows anyway. It's a boy... The first time I saw it (on an ultrasound)... I called him Tad, because he looked like a tadpole. I still wanna call him Tad."

Cowell's girlfriend Lauren Silverman confirmed reports she's expecting a baby with him this summer.