Simon Cowell was left devastated after the death of his beloved mum Julie, who passed away over the weekend at the age of 89.
X Factor auditions were due to start in Manchester on Monday, but were cancelled after the news of her passing.
Now, as two days of try-outs are scheduled to take place in the city, Simon has returned to Twitter to pay homage to the most important woman in his life.
The father-of-one tweeted: "My family lost someone very special on Sunday. My Mum.”
He also thanked his fans for their support during the difficult time, adding: “I am overwhelmed with gratitude for all of the kind messages received.
“Thank you."
Simon is expected to attend today’s X Factor auditions along with judges Rita Ora, Cheryl Fernandez-Versini and Nick Grimshaw.
A family spokesman broke the sad news of Julie’s death on Monday, saying: "Today our beloved mum Julie passed away. Anyone who had met her would know what a truly special and kind lady she was.
"We are heartbroken and will miss her terribly, but she is now at peace.
"We would like to thank the media for kindly respecting Julie's privacy throughout and we politely request continued privacy for the entire family at this particularly difficult time.”
Julie was mother to Simon and three other boys – Nicholas, Tony and Michael.
She was also step-mother to John and June.