Cowell congratulates ex Seymour on pregnancy

Cowell – who dated the brunette for around six years – took to his Twitter account to reveal he and partner Lauren Silverman are delighted for the couple.

Congratulations @TerriSeymour and Clark. Me and Lauren are very excited for you both. If it's a boy you can call him simon.

— Simon Cowell (@SimonCowell) September 22, 2014

While he is keen for Terri, who is four months pregnant, to have a boy, he also wouldn't mind if the 'Extra' red carpet host had a baby girl so he can set her up with his and Lauren's seven-month-old son Eric.

Terri said: "Immediately after congratulating me the first thing he said was he had to be the godfather.

"Then he said it was perfect timing with his son Eric being so young and he hoped I would have a baby girl so he could set her up with Eric and they could date. 'How perfect would that be,' he said. Typical Simon."

Terri also admitted she swore Simon to secrecy about her baby news because she was desperate to tell Lauren herself.

She added to HELLO! magazine: "Lauren was in New York and Simon was in LA and I wanted to be the one to tell her.

"Amazingly, he managed to keep it a secret – he's usually terrible at keeping them so I wasn't sure he'd be able to do it. Lauren has been great. She has been amazing with baby tips, too."

Terri previously praised Simon for being a naturally great father, despite admitting he didn't even know how to hold a baby before he had Eric.

She said: "He's great actually. I mean he hasn't changed his lifestyle because Simon wouldn't. But he's very good. He'd never even held a baby before, so he was like, 'How do you hold a baby?'

"You have to remind him every now and then about the head... But he's really good and he loves it. Everybody was like, 'Oh my God, this is going to be so strange' but it's all been very natural."