Conrad Hilton has been sentenced to two months in prison.

Conrad Hilton

Conrad Hilton

The 22-year-old brother of Paris and Nicky Hilton had his probation revoked on Monday (06.06.16) after he failed a number of drug tests, U.S. Assistant attorney Alexander Schwab told Entertainment Tonight.

He was also terminated from a substance abuse programme.

Schwab said: "The U.S. Attorney's Office was satisfied with the sentencing - two months was the recommendation we made in court.

"Conrad has 48 hours from noon this morning to report to jail. He has to report to the custody of the Bureau of Prisons. The U.S. Marshals Service will arrange exactly where he will report to for his time."

A source said: "Conrad Hilton was in tears when the sentencing was announced. His parents were in the courtroom as well."

In January, Conrad was ordered to spend 90 days in a drugs facility after he allegedly violated his probation by trespassing, failing a drug test, refusing to complete three treatment programmes and leaving California without prior permission from his probation officer.

The order came after he was arrested in May 2015 for breaking into his ex-girlfriend Hunter Salomon's Hollywood residence, despite her having a restraining order against him.

Hunter - whose father Rick Salomon infamously starred in a sex tape with Conrad's older sister Paris - previously filed documents against her former boyfriend in which she claims he said he will commit suicide, threatened violence and asked for her hand in marriage while visiting her at her mother's house.

A restraining order stated Conrad must stay 100 yards away from Hunter, her sister Tyson, her mother E. G. Daily and her father.

Just one week before, Conrad was sentenced to a $5,000 fine, 750 hours of community service and to undergo treatment at a mental health center following an incident on board a British Airway flight from London to Los Angeles in July 2014.

The hotel heir had previously pleaded guilty to a misdemeanor count of simple assault following his 10-hour meltdown on the plane, during which he reportedly screamed threats at flight attendants.