Although Simon has not yet confirmed the whispers that Lauren - who is married to his friend Andrew - is pregnant, his former flame Sinitta has got followers wondering what she thinks with a cryptic tweet on Twitter.
On Monday (29 July), Sinitta told fans: "Something has just happened...half miracle, half nightmare! #WakeMeUpIWantToGetOff."
Although it does not directly refer to the whispers, the timing is perfect...
Following a brief relationship in the 80s, Simon and Sinitta have remained close and she is probably his most famous ex-girlfriend.
Something has just happened ..half miracle, half nightmare! #WakeMeUpIWantToGetOff!!— Sinitta (@sinittaofficial) July 29, 2013
The pair, along with his fellow exes Terri Seymour, Jackie St Clair and Mezhgan Hussainy, often hang out together and go on holiday. Lauren, however, appears to be the new kid on the block.
Meanwhile, Britain's Got Talent judges David Walliams and Amanda Holden have tweeted about the rumours that Simon is to become a dad for the first time.
David said: "For the record @SimonCowell and I tried to have a baby together for many years. But I just couldn't get pregnant." Earlier, he'd said: "Oh yeah, and @SimonCowell is doing a baby with a lady."
Amanda also told fans: "So! All Four Judges with potentially 4 kids under 2 for BGT 2014!!"
Simon has remained silent since the rumours surfaced. Reveal contacted his camp for a comment but we have not heard back.
While we may not be 100 per cent certain Simon's having a baby, these stars definitely are!
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