A robber broke into the multi-million dollar home of David and Victoria Beckham while the couple was in an upstairs bedroom unconscious, according to reports.

The couple and daughter Harper, 10, reportedly were unaware that a thief had broken into their home in Holland Park, West London.

The theft was discovered by their son, Cruz, the moment he returned from a night out with friends.

He noticed that a bedroom had been robbed, in which the window glass had also been broken.

Metropolitan Police confirmed that they had been called to the property at 00:37 a.m. on March 1 and believed the theft had occurred between 20:30 and 23:30.

No arrests have been made and investigations are ongoing.

"Fortunately, the criminals only arrived in one bedroom before fleeing."

Home security is "very good, both physically and technically," the source said.

None of the items stolen - believed to be worth thousands of pounds - had sentimental value.