The 53-year-old 'X Factor' boss is awaiting the birth of his first child with his socialite girlfriend, reported Contactmusic.
"It really is a miracle. The baby was kind of unexpected. I hadn't planned for that. Once I got used to it, I thought, it's actually not such a big deal. I called it 'Tad' because it was like a little tadpole - just, like, moving around," Cowell told Terri Seymour during an interview.
"Once you see the baby on the scan for the first time you're just amazed that you're seeing something alive. It's incredible. Maybe I will take him or her go-karting. I'm good with kids, and I like kids.
"Babies, I have a little problem with because I never know how to hold them. But I like the idea of having a little buddy," he added.