The news that Simon Cowell is reportedly set to welcome his first child has sent the celebrity news world into meltdown, but it is his friends and colleagues that have been left most shocked.

simon cowell

Simon Cowell

Simon's ex-girlfriend Sinitta appeared to be the first to react to the news that the 'X Factor' boss is alleged to be expecting a baby with his friend's wife, Lauren Silverman, describing it as "half miracle, half nightmare".

Who is Lauren Silverman? Here's everything you need to know about Simon Cowell's alleged baby mama.. in 90 seconds

His fellow 'Britain's Got Talent' judges David Walliams and Amanda Holden have also spoken out, while 'X Factor' judge Sharon Osbourne has said he "will be a great father".

Take a look at their reactions in the gallery below...

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Meanwhile, Simon's mother Julie is reported to have told The Sun she is "delighted" at the "wonderful" news.

However, he is yet to speak about the news, and the office for his Los Angeles lawyer said on Wednesday: "We have no comment."

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