Known world over for being blunt and often controversial and insulting about contestants' abilities, the Britain's Got Talent judge became the victim of a shocking security lapse on Saturday night.   

A woman intruder, in an alleged break-in, entered his mansion armed with a brick, and is believed to have sauntered around his West London home, lay down on his bed and walked into his bathroom. Cowell, to his horror, encountered her in the lounge area.

Leanne Zaloumis, 29, supposedly entered the house through a window downstairs when Cowell, 52, was in the lounge area watching television.

Cowell told a friend: It was an absolutely terrifying experience. Seeing this woman standing there in my house was like something out of a horror movie. It was frightening but I'm going to take it as a warning. In some ways I've been lucky. You have to look on the positive side because it could have been a whole lot worse. I now know that I need to improve my security. She could have had a gun, reports Mail online.

The woman's motive behind breaking into the house is still unclear. Nothing from the property worth £9 million was taken by the woman, who was later detained by Cowell's security staff.

Simon Cowell, who has featured in Britain's Got Talent and The X Factor among other famous TV programs, is estimated to have a total worth of £300 million.

The incident took place after 10 p.m. on Saturday.

A friend of Cowell's stated that he was pretty shaken up with the experience, because it was unexpected.

The woman was arrested on suspicion of burglary and taken to a West London police station.

Earlier in 2008, Cowell had a tracker magnetically attached to the car's undercarriage by an unknown motorcyclist and the matter was investigated by experts.

Cowell's spokesman Max Clifford said Sunday that this is a police matter.