The talent show boss postponed filming of the The X Factor U.K. after his family matriarch Julie suffered a stroke and passed away aged 89.

Ahead of filming resuming in Manchester, England on Wednesday (08Jul15), Cowell took to Twitter.com to thank his followers for their kindness after his bereavement.

He writes, "My family lost someone very special on Sunday. My Mum. I am overwhelmed with gratitude for all of the kind messages received. Thank you..."