Conrad Hilton ordered into substance abuse treatment program

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Conrad Hilton Ordered Into Rehab After Failing Drug Tests

Paris Hilton's brother, Conrad Hilton, was ordered on Wednesday to check into a residential substance abuse treatment program after a Los Angeles judge ruled he had violated the terms of his probation by failing drug tests.

The judge denied the prosecutors'request to put the 21-year-old hotel heir behind bars for 60 days and instead ordered him to spend 90 days in treatment, according to the Associated Press. In addition to failing drug tests, authorities said Hilton also did not complete three prior treatment programs and traveled outside of California without getting authorization from his probation officer.

SEE MORE: Nick Carter Breaks His Silence After Arrest for Alleged Florida Brawl

Last year, Hilton was given three years probation and 750 hours community service after pleading guilty to attacking a number of flight attendants in 2014 during a British Airways flight from London to Los Angeles.

RELATED: See photos of Paris Hilton from over the years:

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Paris Hilton through the years
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Conrad Hilton ordered into substance abuse treatment program
Paris Hilton and Tinkerbell during Paris Hilton Signs Her Book 'Your Heiress Diary: Confess it All to Me' at Virgin Megastore in New York City - December 1, 2005 at Virgin Megastore in New York City, New York, United States. (Photo by J. Vespa/WireImage)
LOS ANGELES - JUNE 12: Grand Marshall Paris Hilton (L) and her mother Kathy Hilton ride on the float at the 2005 West Hollywood Gay Pride Parade, June 12, 2005 in Los Angeles, California. (Photo by Phil McCarten/Getty Images)
@parishilton showing off a new pair, Milan
Backstage at @PhilippPlein78 with my boy @SnoopDogg. #MMFW 🎶😎😎🎶
#GoodTimes at @JustCavalliMilano with @IblameJordan. 🎉🎶🎉🎶
At sound check for my show tonight at @JustCavalliMilano. Can't wait! It's going to be fun! #PartyPrincessinMilan 🎶👸🎶 #MMFW
MILAN, ITALY - JANUARY 18: Paris Hilton is seen leaving the Cavalli Club on January 18, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
MILAN, ITALY - JANUARY 18: Paris Hilton is seen leaving the Cavalli Club on January 18, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
MILAN, ITALY - JANUARY 18: Paris Hilton is seen leaving the Cavalli Club on January 18, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
MILAN, ITALY - JANUARY 18: Paris Hilton is seen leaving the Cavalli Club on January 18, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
MILAN, ITALY - JANUARY 17: Paris Hilton attends the Philipp Plein Show during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 17, 2015 in Milan, Italy. (Photo by Jacopo Raule/Getty Images)
MILAN, ITALY - JANUARY 17: Paris Hilton attends the Philipp Plein Show during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 17, 2015 in Milan, Italy. (Photo by Jacopo Raule/Getty Images)
MILAN, ITALY - JANUARY 16: Paris Hilton; Renzo Rosso and Arianna Alessi attend the Dsquared2 during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 16, 2015 in Milan, Italy. (Photo by Stefania D'Alessandro/Getty Images)
MILAN, ITALY - JANUARY 16: Dean Caten, Paris Hilton and Dan Caten attend the Dsquared2 Party during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 16, 2015 in Milan, Italy. (Photo by Venturelli/WireImage)
MILAN, ITALY - JANUARY 17: Paris Hilton attends the Philipp Plein show as a part of Milan Menswear Fashion Week Fall Winter 2015/2016 on January 17, 2015 in Milan, Italy. (Photo by Venturelli/WireImage)
MILAN, ITALY - JANUARY 16: Dean Caten; Paris Hilton and Dan Caten attend the Dsquared2 during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 16, 2015 in Milan, Italy. (Photo by Venturelli/WireImage)
MILAN, ITALY - JANUARY 16: Paris Hilton and Riccardo Scamarcio attend the Dsquared2 during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 16, 2015 in Milan, Italy. (Photo by Venturelli/WireImage)
MILAN, ITALY - JANUARY 16: Paris Hilton attends the Dsquared2 during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 16, 2015 in Milan, Italy. (Photo by Venturelli/WireImage)
MILAN, ITALY - JANUARY 16: Salvo Nicosia and Paris Hilton attend the Dsquared2 during the Milan Menswear Fashion Week Fall Winter 2015/2016 on January 16, 2015 in Milan, Italy. (Photo by Venturelli/WireImage)
MILAN, ITALY - JANUARY 16: Paris Hilton is pictured in Milan for the Men's Fashion Week on January 16, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
MILAN, ITALY - JANUARY 16: Paris Hilton (shoe detail) is pictured in Milan for the Men's Fashion Week on January 16, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
MILAN, ITALY - JANUARY 16: Paris Hilton is pictured in Milan for the Men's Fashion Week on January 16, 2015 in Milan, Italy. (Photo by Robino Salvatore/GC Images)
NEW YORK, NY - JANUARY 14: Nicky Hilton and Paris Hilton are seen walking in SoHo on January 14, 2015 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES, CA - JANUARY 12: Paris Hilton attends West Coast Reveal Of The New 2016 Next Generation Chevrolet Volt at Quixote Studios on January 12, 2015 in Los Angeles, California. (Photo by Michael Buckner/Getty Images for Chevrolet Volt)
SANTA MONICA, CA - JANUARY 10: TV Personality Paris Hilton attends The World Dog Awards at Barker Hangar on January 10, 2015 in Santa Monica, California. (Photo by Paul Archuleta/FilmMagic)
SANTA MONICA, CA - JANUARY 10: Socialite/TV Personality Paris Hilton and her dog Prince serve as presenters at 'The World Dog Awards' at Barker Hangar on January 10, 2015 in Santa Monica, California. (Photo by Earl Gibson III/Getty Images)
SANTA MONICA, CA - JANUARY 10: (L-R) Singer Lance Bass with his dog Lily, TV personality Lisa Vanderpump with her dog Giggy, socialite Paris Hilton with her dogs, Princess Paris, Jr. and Prince Hilton, socialite Allison Melnick and actress Pauley Perrette arrive at The World Dog Awards at Barker Hangar on January 10, 2015 in Santa Monica, California. (Photo by Chelsea Lauren/WireImage)
SANTA MONICA, CA - JANUARY 10: Socialite/TV Personality Paris Hilton and her dog Prince serve as presenters at 'The World Dog Awards' at Barker Hangar on January 10, 2015 in Santa Monica, California. (Photo by Earl Gibson III/Getty Images)
LOS ANGELES, CA - JANUARY 08: Paris Hilton attends the W Magazine celebration of the 'Best Performances' Portfolio and The Golden Globes with Cadillac and Dom Perignon at Chateau Marmont on January 8, 2015 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images for W Magazine)
LOS ANGELES, CA - JANUARY 05: Paris Hilton goes to Subway Restaurant and gets a sandwich on January 05, 2015 in Los Angeles, California. (Photo by Michael King/BuzzFoto via Getty Images)
LOS ANGELES, CA - JANUARY 05: Paris Hilton is seen on January 5, 2015 in Los Angeles, California. (Photo by SMXRF/Star Max/GC Images)
WEST HOLLYWOOD, CA - JANUARY 08: Paris Hilton attends Kari Feinstein's Pre-Golden Globes Style Lounge at Andaz West Hollywood on January 8, 2015 in West Hollywood, California. (Photo by Rebecca Sapp/WireImage)
LOS ANGELES, CA - JANUARY 05: Paris Hilton goes to Subway Restaurant and gets a sandwich on January 05, 2015 in Los Angeles, California. (Photo by Michael King/BuzzFoto via Getty Images)
ASPEN, CO - DECEMBER 22: Paris Hilton is seen on December 22, 2014 in Aspen, Colorado. (Photo by Bauer-Griffin/GC Images)
LONDON, UNITED KINGDOM - DECEMBER 16: Paris Hilton is seen leaving the Sanderson Hotel on December 16, 2014 in London, England. (Photo by Fjeraku/GC Images)
LONDON, UNITED KINGDOM - DECEMBER 16: Paris Hilton is seen leaving the Sanderson Hotel on December 16, 2014 in London, England. (Photo by Fjeraku/GC Images)
LONDON, UNITED KINGDOM - DECEMBER 16: Paris Hilton is seen leaving the Sanderson Hotel on December 16, 2014 in London, England. (Photo by Fjeraku/GC Images)
LONDON, UNITED KINGDOM - DECEMBER 16: Paris Hilton at the Streaky Gin bar in Kensington on December 16, 2014 in London, England. (Photo by Mark Robert Milan/GC Images)
LONDON, UNITED KINGDOM - DECEMBER 15: Paris Hilton at the Chiltern Firehouse on December 15, 2014 in London, England. (Photo by Mark Robert Milan/GC Images)
LONDON, UNITED KINGDOM - DECEMBER 15: Paris Hilton at the Chiltern Firehouse on December 15, 2014 in London, England. (Photo by Mark Robert Milan/GC Images)
CANNES, FRANCE - DECEMBER 13: (EDITORS NOTE: This image has been converted from color to B/W) Paris Hilton arrives at the 16th NRJ Music Awards at Palais des Festivals on December 13, 2014 in Cannes, France. (Photo by Francois G. Durand/Getty Images)
CANNES, FRANCE - DECEMBER 13: Paris Hilton arrives at the 16th NRJ Music Awards at the Palais des Festivals on December 13, 2014 in Cannes, France. (Photo by Tony Barson/FilmMagic)
CANNES, FRANCE - DECEMBER 13: Paris Hilton arrives at the 16th NRJ Music Awards at the Palais des Festivals on December 13, 2014 in Cannes, France. (Photo by Tony Barson/FilmMagic)
CANNES, FRANCE - DECEMBER 13: Paris Hilton arrives at the 16th NRJ Music Awards at Palais des Festivals on December 13, 2014 in Cannes, France. (Photo by Francois G. Durand/Getty Images)
US actress and entertainer Paris Hilton poses upon her arrival at the Palais des Festivals to attend the 16th Annual NRJ Music Awards on December 13, 2014 in Cannes, southeastern France. AFP PHOTO / VALERY HACHE (Photo credit should read VALERY HACHE/AFP/Getty Images)
LOS ANGELES, CA - DECEMBER 11: Paris Hilton seen at LAX on December 11, 2014 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
MIAMI BEACH, FL - DECEMBER 05: Paris Hilton walks the red carpet before DJ's at Wall at W Hotel on December 5, 2014 in Miami Beach, Florida. (Photo by Johnny Louis/FilmMagic)
MIAMI BEACH, FL - DECEMBER 05: Paris Hilton walks the red carpet before DJ's at Wall at W Hotel on December 5, 2014 in Miami Beach, Florida. (Photo by Johnny Louis/FilmMagic)
MIAMI BEACH, FL - DECEMBER 05: Paris Hilton walks the red carpet before DJing at Wall at W Hotel on December 5, 2014 in Miami Beach, Florida. (Photo by Kris Connor/Getty Images)
LOS ANGELES, CA - DECEMBER 10: Paris Hilton is seen on December 10, 2014 in Los Angeles, California. (Photo by JMA/Star Max/GC Images)
MIAMI BEACH, FL - DECEMBER 05: Paris Hilton walks the red carpet before DJing at Wall at W Hotel on December 5, 2014 in Miami Beach, Florida. (Photo by Kris Connor/Getty Images)
MIAMI BEACH, FL - DECEMBER 04: Paris Hilton attends Jeremy Scott & Moschino Party with Barbie on December 4, 2014 in Miami Beach, Florida. (Photo by Venturelli/WireImage)
MIAMI BEACH, FL - DECEMBER 04: Paris Hilton attends Jeremy Scott & Moschino Party with Barbie on December 4, 2014 in Miami Beach, Florida. (Photo by Venturelli/WireImage)
MIAMI BEACH, FL - DECEMBER 04: Paris Hilton attends Jeremy Scott & Moschino Party with Barbie on December 4, 2014 in Miami Beach, Florida. (Photo by Venturelli/WireImage)
MIAMI BEACH, FL - DECEMBER 04: Paris Hilton attends Jeremy Scott & Moschino Party with Barbie on December 4, 2014 in Miami Beach, Florida. (Photo by Venturelli/WireImage)
MIAMI BEACH, FL - DECEMBER 04: Paris Hilton attends Jeremy Scott & Moschino Party with Barbie on December 4, 2014 in Miami Beach, Florida. (Photo by Venturelli/WireImage)
MIAMI BEACH, FL - DECEMBER 03: Paris Hilton attends 2nd Annual Women In Art Benefit on December 3, 2014 in Miami Beach, Florida. (Photo by Robin Marchant/Getty Images for Women in Art Benefit)
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In June, authorities confirmed to ET that Hilton was arrested again on suspicion of violating a restraining order obtained by his ex-girlfriend, Hunter Daily.

READ MORE: Helpful Tips for Paris Hilton's Little Brother Conrad on How to Behave in Public

Paris Hilton's ex-boyfriend, Nick Carter, also had a run-in with the law this month after he was arrested for an alleged brawl at a bar in Key West, Florida. Backstreet Boys member AJ McLean defended Carter's behavior, telling ET that "everyone makes mistakes." Check it out:

Backstreet Boys Singer AJ McLean Defends Nick Carter After Arrest
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