Simon Cowell's luxury home in west London has been burgled while he and his family were inside, according to reports.
The Daily Mirror says the thieves struck at around 2am on Friday morning and escaped with cash and jewellery.
Cowell, his girlfriend Lauren Silverman and son Eric were all asleep at the time.
The Mirror quotes a source as saying: "It was clearly a very traumatic incident.
"Simon is just relieved that his family was safe and all right. Their safety is his number one priority."