Paris Hilton's L.A. home was robbed Friday and the thief made off with jewelry and other valuables worth about $2 million US. ((Evan Agostini/Associated Press))

In one of the biggest home break-ins in Los Angeles this year, a thief made off with about $2-million US worth of jewelry and other valuables from Paris Hilton's home Friday.

Hilton, 27, was not at home when the break-in occurred.

The U.S. socialite's 7,500-square-foot mansion in Los Angeles' Sherman Oaks neighbourhood is equipped with a security system, and the gated community has its own security force.

A security guard reported the robbery, telling police the burglar wore a hooded sweat shirt and gloves, and entered the house through the front door.

According to the Los Angeles Times, city police believe the thief may be familiar with the house and the neighbourhood.

The thief doesn't appear to be a professional burglar, the newspaper added, and investigators do not believe the incident is connected to a string of burglaries at the homes of celebrities in the city.

Hilton bought her home last year for more than $5 million US. In October, she took talk show host Ellen Degeneres on a televised tour of the property.

In 2004, several thousand dollars' worth of jewelry and money was stolen from a home Hilton shared with her sister, Nicky Hilton.

With files from the Associated Press