Conrad Paris Hilton
Conrad Hilton (seen here with sister Paris) is the heir to the family hotel empire. Getty

The brother of Paris Hilton has been arrested by Los Angeles Police (LAPD) after the playboy was discovered in a Bentley owned by his ex-girlfriend's father.

Conrad Hilton, 23, who once dated Hunter Daily Salomon, also allegedly violated a restraining order from her in the process of stealing the car, which belongs to Rick Salomon.

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Hilton, who is a heir to the Hilton hotel empire, was taken into custody by the LAPD at around 5am UTC (1pm GMT).

Rick Salomon coincidentally used to be romantically involved with Conrad's elder sister and TV personality Paris Hilton – and he is alleged to be the man featured in her infamous sex tape that leaked online in 2003.

Salomon, 48, made his name playing poker but was also married to former Baywatch actress Pamela Anderson on two occasions in 2007 and 2014 – both marriages lasting less than a few months.

Conrad Hilton has had a chequered past and has been in hot water with police over a number of disturbances – including one that occurred on a British airline.

In 2015 the youngster was sentenced to 750 hours of community service work for threatening members of the crew on board a British Airways flight from London to Los Angeles. Hilton had allegedly taken drugs on board the flight and reportedly threatened to kill members of staff.

"I am going to f***ing kill you," he is alleged to have told an airline crew member.

"I will f***ing rip through you. I will f***ing own anyone on this flight; they are f***ing peasants."

In addition, the controversial young man has racked up offences such as reckless driving after crashing his car in 2014 and was arrested at Hunter's house in the same year while they were still a couple.

Hilton's bail has been set at $60,000 (£46,000).