Simon Cowell had to pull out of the Britain's Got Talent auditions at the last minute due to a painful illness
Simon Cowell was forced to withdraw from filming Britain's Got Talent after being struck down with an illness.
The music boss, 64, missed a number of auditions after suffering a crippling headache that left him too unwell to work.
A source told the Daily star: 'Simon was supposed to be filming normally, but he started feeling unwell.
'After some discussion, he told everyone that he could not participate in the recordings.
“To say he was frustrated was an understatement. Simon loves making Britain's Got Talent so he was sad to miss the filming.'
Simon Cowell was forced to withdraw from filming of Britain's Got Talent after being struck by an illness (pictured last month)
The music boss, 64, missed a number of auditions after suffering a crippling headache that left him too unwell to work (pictured last month)
Simon missed a small number of evening auditions after developing a headache and left tryouts early before returning as planned for the next run in Manchester.
MailOnline has contacted Britain's Got Talent and a representative for Simon for comment.
Simon and his fellow Britain's Got Talent judges Alesha Dixon, Bruno Tonioli and Amanda Holden, along with presenters Ant McPartlin and Declan Donnelly, returned to filming for the upcoming series last month.
They were spotted posing on the red carpet outside the London Palladium, where hopefuls came out in droves hoping to find success at the show.
Simon's illness comes after police led a female intruder away from the BGT set last month after she 'tried to get backstage' to see the judges.
The unidentified woman, who was pictured with her hood up, reportedly tried to “sneak” past security and enter the restricted area.
A Met Police spokesperson said: 'Police were called at 1.23pm today to reports of a woman suffering from a mental health crisis in Argyll Street, W1.
'Officers and the London Ambulance Service attended. The woman was assisted by officers who arranged for her to be met by a family member. There were no violations.'
Simon and fellow BGT judges Alesha Dixon, Bruno Tonioli and Amanda Holden, along with presenters Ant McPartlin and Declan Donnelly, returned to filming for the new series last month (front row: judges Bruno, Alesha, Amanda and Simon. Back row: presenters Ant and December)
A Fremantle spokesperson added: 'Police dealt with an individual outside the Palladium who caused some commotion, and the BGT team assisted to the rescue. But BGT did not call the police and there was no threat to the judges because they did not enter the Palladium.'
Audiences reportedly heard chatter among theater staff saying an intruder was “trying to sneak in backstage” to see Simon and his celebrity counterparts.
Auditions for the popular television talent show, which seeks to find the country's next star, have been postponed due to the chaos caused by the 'intruder', according to reports.
She was pictured wearing a hooded tracksuit flanked by officers as she was escorted out of the theater. Officers were seen speaking to theater door staff after the incident, as a small crowd gathered outside the stage door, with security staff standing by.
(L-R) Host Ant McPartlin, judges Bruno Tonioli, Simon Cowell, Alesha Dixon, Amanda Holden and presenter Declan Donnelly ahead of auditions at The London Palladium last month