The cause of "Glee" actor Cory Monteith's death remained unclear Monday, and authorities in Canada said it could take several days before toxicology test results are in.
Vancouver police Sgt. Randy Fincham said there's nothing to indicate the death was due to illicit drug use.
Monteith, 31, was found dead in his Vancouver, British Columbia, hotel room on Saturday, according to police, who have ruled out foul play.
Police said Monteith had been out with people earlier, but video and electronic records from the hotel indicated he returned to his room by himself early Saturday. He was believed to be alone when he died.
Monteith's passing recalls the lives of Heath Ledger, Corey Haim and River Phoenix – actors who battled substance abuse and died in their 20s and 30s. Monteith talked bluntly about struggling with addiction since he was a teenager, calling it a serious problem and telling Parade magazine in 2011 he was "lucky to be alive."
Monteith admitted himself to a treatment facility in April for substance addiction and asked for privacy as he took steps toward recovery, a representative said at the time. Lea Michele, Monteith's "Glee" co-star and real-life girlfriend, told People magazine that she loved and supported him and was proud he was seeking help. It was not Monteith's first time in rehab. He also received treatment when he was 19.
Michele was asking that everyone respect her privacy "during this devastating time," said her representative, Molly Kawachi of ID-PR.
The Fox network and the producers of "Glee," including 20th Century Fox Television, called Monteith an exceptional performer "and an even more exceptional person." Michele asked for privacy upon hearing the news of his death.
Monteith had recently shot a Canadian film called "All the Wrong Reasons," with actors Kevin Zegers, Karine Vanasse and Emily Hampshire, slated to debut on the festival circuit this fall.
Gia Milani, who produced, directed and wrote the screenplay, said Monteith portrays a ruthless department store manager who shows a unique vulnerability when he helps his wife deal with post-traumatic stress disorder. She said Monteith connected with the role because he had retail experience, working in a Walmart in Vancouver when he was younger.
"There were some risque moments in the film and he's very intense in it and passionate," Gilani told Canadian Press in a telephone interview from just north of Shediac, New Brunswick, her voice still shaky from the shock of Monteith's death over the weekend. "He pulled it off flawlessly."
Milani said Monteith "seemed healthy" when she last saw him four weeks ago in Los Angeles to screen the film for him.
"He looked super fit and he was energetic and excited. He was really good," she said.
She said Monteith showed no signs of a substance abuse problem while shooting the film a year ago in Halifax, Nova Scotia. He was shooting "Glee" at the same time and would take a red-eye flight from Los Angeles to Halifax on Sundays, arrive-mid-morning and "still know his lines and still be fresh and focused," she said.
"He had amazing ideas and he brought a lot to the role," said Milani. "He had just an outstanding work ethic."
Milani said Monteith told her "he felt like he had achieved so much with `Glee' that it gave him permission to do other things," including smaller films such as hers.
Off the set, Monteith was "always gracious" in accommodating fans when they approached him as he dined in restaurants, said Milani.
"Never one time was he rude, never one time did he say no," she said. "He was a super accessible guy, which is just all the more painful."
Outside the Vancouver hotel, Monteith's fans created a makeshift memorial.. (hash)RipCoryMonteith and (hash)StayStrongLea became trending topics on Twitter.
In England, what was supposed to be a weekend celebration of "Glee" turned into an impromptu memorial after news of Monteith's death rocked a fan convention.
"The news was devastating. No one had any idea what to say or do," said Chloe Harvey, an 18-year-old fan from Portsmouth, England. "It just shows how much of a truly amazing guy Cory was that everyone was so shocked and emotional about the news."
"Glee," with its catchy song-and-dance numbers and high-profile guest stars like Gwyneth Paltrow and Britney Spears, became an instant hit when it debuted in 2009 and made celebrities of Montieth and the rest of the relatively unknown cast.
Monteith served as the show's resident hunk with a heart of gold. He played Finn Hudson, a football quarterback with two left feet who found more camaraderie in the choir room than on the football field. After his character graduated high school, Hudson sought out to find himself before settling on what he wanted to do with his life: become a teacher and mentor.
In real life, Monteith was an avid supporter of an arts mentoring program, Project Limelight, which worked with young people in Vancouver's poverty-stricken Downtown Eastside district. In May 2012, Monteith and Richard Branson, the Virgin Group founder and chairman, traveled to Vancouver to support the charity.
"Cory Monteith was a beautiful soul," Branson said in a blog post on Virgin's website. "His awareness of his own struggles led him to reach out to young people all over the world with deep compassion and empathy to help them through their struggles."
"We'll never forget watching him on the streets in Canada," wrote Branson. "Cory wanted other youth to have the chance to discover their strengths and potential through the arts."
AP writer Charles J. Gans in New York contributed to this report.
Follow AP Entertainment Writer Derrik J. Lang on Twitter at . http://www.twitter.com/derrikjlang
Shirley Temple Black, iconic child star and former U.S. ambassador to Ghana and Czechoslovakia, <a href="http://www.huffingtonpost.com/2014/02/11/shirley-temple-dead-child-star-ambassador-dies_n_4765333.html?1392116282&ncid=edlinkusaolp00000009" target="_blank">died on Feb. 10, 2014 in California</a>, The Associated Press reported. Her cause of death was not released. She was 85.
Philip Seymour Hoffman
<a href="http://www.huffingtonpost.com/2014/02/02/philip-seymour-hoffman-dead-dies_n_4713623.html" target="_blank">Hoffman was found dead of an apparent heroin overdose</a> on Feb. 2, 2014 in New York City. He was 46 years old.
The American troubadour, folk singer and activist Seeger died Jan. 27, 2014, at age 94.
Avery died at the age of 68 from complications following open heart surgery in a Los Angeles suburb hospital on Dec. 31, 2013
Price died on Dec. 16, 2013 at his Texas home after a long battle with pancreatic cancer. He was 87.
The legendary actor of the stage and screen died on Dec. 14, 2013 following a long illness. He was 81.
After suffering from a prolonged respiratory infection, Mandela died on Dec. 5, 2013 at the age of 95.
<a href="http://www.huffingtonpost.com/2013/11/30/paul-walker-dead_n_4366214.html?utm_hp_ref=celebrity" target="_blank">Walker died in a car crash on Nov. 30, 2013</a>, his rep confirmed. He was 40.
<a href="http://www.huffingtonpost.com/2013/10/27/lou-reed-dead_n_4167976.html" target="_blank">Reed died of a "liver-related ailment"</a> on Oct. 27, 2013 at the age of 71.
<a href="http://www.huffingtonpost.com/2013/10/26/maria-wallace-dead-simpsons_n_4166343.html" target="_blank">Wallace died of complications due to pneumonia</a> on Oct. 25, 2013 at the age of 70.
<a href="http://www.huffingtonpost.com/2013/10/16/ed-lauter-dead-dies_n_4111710.html" target="_blank">Veteran character actor Lauter died of mesothelioma</a>, a rare form of cancer most commonly caused by asbestos exposure, on Oct. 16, 2013. He was 74.
Choreographer and dance instructor Patsy Swayze, the mother of late actor Patrick Swayze, died Sept. 16, 2013. She was 86. No cause of death was given.
Jackie Lomax, a singer-songwriter who worked with The Beatles and enjoyed a long solo career, died Sept. 15, 2013 following a brief illness. He was 69.
Lee Thompson Young
<a href="http://www.huffingtonpost.com/2013/08/19/lee-thompson-young-dead_n_3780781.html?ref=topbar" target="_blank">"The Famous Jett Jackson" star was found dead</a> in his apartment by his landlord in Los Angeles on Aug. 19, 2013. Young's rep confirmed that he took his own life. He was 29.
Lisa Robin Kelly
<a href="http://www.huffingtonpost.com/2013/08/15/lisa-robin-kelly-dead_n_3763163.html" target="_blank">The former "That '70s Show" actress died</a> at the age of 43 on Aug. 14, 2013. According to TMZ, Kelly died in her sleep at a rehab facility in California.
<a href="http://www.huffingtonpost.com/2013/08/14/gia-allemand-dead_n_3756940.html?utm_hp_ref=mostpopular" target="_blank">"The Bachelor" star died from an apparent suicide</a> on Aug. 14, 2013. She was 29.
<a href="http://www.huffingtonpost.com/2013/08/02/michael-ansara-dead-dies_n_3697009.html" target="_blank">The "Star Trek" actor died</a> on July 31, 2013 at the age of 91.
Radio personality <a href="http://www.huffingtonpost.com/2013/07/28/kidd-kraddick-dead_n_3665417.html" target="_blank">David "Kidd" Kraddick died July 27, 2013</a> at age 53.
Cale, the singer-songwriter and producer known as the main architect of the Tulsa Sound, <a href="http://www.huffingtonpost.com/2013/07/27/jj-cale-dead-dies_n_3664256.html" target="_blank">died on July 26, 2013</a>. His manager, Mike Kappus, said he died of a heart attack. He was 74.
<a href="http://www.huffingtonpost.com/2013/07/22/dennis-farina-dead_n_3635587.html" target="_blank">The "Law & Order" star died on July 22, 2013 at the age of 69</a> after suffering a blood clot in his lung.
Cory Allan Michael Monteith, a Canadian actor best known for playing Finn Hudson on the hit Fox TV show "Glee," was found dead on July 13, 2013 in a Vancouver hotel room. He was 31.
James Gandolfini, best known for his role on "The Sopranos," died in Italy on June 19, 2013 after suffering from a heart attack.
The high-pitched country singer who sold millions of records through ever-present TV ads in the 1980s and 1990s and whose song saved the world in the film comedy "Mars Attacks!," died June 19, 2013 at a Florida hospital. He was 90.
Jeanne Cooper, who played Katherine Chancellor on the daytime soap opera "The Young and the Restless," <a href="http://www.huffingtonpost.com/2013/05/08/jeanne-cooper-dead-dies_n_3239218.html" target="_blank">died on May 8, 2013</a>. She was 84.
Hanneman, a founding member of Slayer, died May 1, 2013 of liver failure. He was 49.
Chris Kelly, one-half of the 1990s rap duo Kris Kross, died May 1, 2013 of an apparent drug overdose. He was 34.
The country music legend died at 81 on April 26, 2013 at Vanderbilt University Medical Center in Nashville, Tennessee. He was hospitalized April 18 with fever and irregular blood pressure.
The folk singer and guitarist, who was the first performer at Woodstock, died on April 22, 2013 at age 72. He died of a heart attack in New Jersey, his family said in a statement.
The raunchy lead singer of the Australian rock band Divinyls whose hit "I Touch Myself" brought her international fame in the early 1990s, died at her home in New York City on April 21, 2013. She was 53 years old. "Christine Joy Amphlett succumbed to the effects of breast cancer and multiple sclerosis, diseases she vigorously fought with exceptional bravery and dignity," her musician husband Charley Drayton said in a statement.
Character actor Richard LeParmentier, who as a young Death Star commander learned the hard way that Darth Vader brooks no disrespect, died April 16, 2013. He was 66.
The comedic film and TV actor died on April 11, 2013 at the age of 87. He passed away of natural causes, surrounded by friends and family.
Former child star Annette Funicello died on April 8, 2013 at the age of 70. The actress, who is best remembered for her time as a Mouseketeer on "The Mickey Mouse Club" from 1955 to 1957, died from complications related to multiple sclerosis, which she was diagnosed with more than 20 years ago.
Legendary film critic Roger Ebert died April 4, 2013, at the age of 70. Two days prior, Ebert revealed on his blog that his cancer had returned and that he would be reducing his reviewing duties at the Chicago Sun-Times.
The 21-year-old "Buckwild" star was found dead in a truck in Sissonville, W. Va., along with two other bodies, on April 1, 2013. It was later said Gandee had died of carbon monoxide poisoning while “mudding," or off-roading through mud, in his 1984 Ford Bronco.
A masterful Grammy Award-winning engineer, arranger and producer whose platinum touch included recordings with Ray Charles, Billy Joel and Paul Simon, Ramone died March 30, 2013 of complications stemming from heart surgery. He was 79.
One of the great British stage actors of his generation, also known for playing grumpy Uncle Vernon in the fantastical "Harry Potter" movies. Griffiths died March 28, 2013, from complications following heart surgery. He was 65.
Former Iron Maiden drummer Clive Burr has died March 12, 2013. He was 56. Burr passed away in his sleep and had suffered poor heath for years after being diagnosed with multiple sclerosis.
A country singer-songwriter and original member of the Louisiana Hayride, King was best known for the 1962 hit "Wolverton Mountain." He died on March 7, 2013, at 90 years of age.
Peter Banks, the original guitarist for the British band Yes, died on March 7, 2013, at the age of 65. A post on his official website stated that Banks died from heart failure and was found in his London home after he didn't show up to a recording session. <br> L-R: Peter Banks, Tony Kaye, Chris Squire, Bill Bruford, Jon Anderson - posed, group shot (Photo by Gilles Petard/Redferns)
The British rock guitarist and founder of the band "Ten Years After," who burst to stardom with a memorable Woodstock performance, died March 6, 2013. He was 68. A statement posted on Lee's official website said he died unexpectedly from complications following a routine surgical procedure. Lee's manager, Ron Rainey, said the guitarist died in Spain.
Bonnie Franklin, the pert, redheaded actress who won fame as a divorced mom on the long-running sitcom "One Day at a Time," has died March 1, 2013 due to complications from pancreatic cancer. She was 69.
DJ Ajax (Adrian Thomas)
Australian producer Adrian Thomas, better known as DJ Ajax, died on the day of his 42nd birthday, Feb. 28, 2013. The Sydney Morning Herald reported DJ Ajax died after he ran out onto a Melbourne road and was hit by an oncoming truck.
Former Motown vocalist Richard Street (top R), a member of the Temptations for 25 years, died on Feb. 27, 2013 at a hospital in Las Vegas after a short illness. He was 70.
Dale Robertson, an Oklahoma native who became a star of television and movie Westerns during the genre's heyday, died Feb. 26, 2013 Scripps Memorial Hospital in La Jolla, Calif., following a brief illness. He was 89.
Former Allman Brothers Band guitarist Dan Toler has died on Feb. 25, 2013, at the age of 65. He passed away in his sleep after a two-year battle with amyotrophic lateral sclerosis, better known as ALS or Lou Gehrig's disease.
Myers, the actor most known for playing Mr. Vernon Gaines on the NBC sitcom "A Different World," died on Feb. 19, 2013 at Charleston Medical Center in West Virginia after undergoing a heart-related emergency and falling into a coma. He was 76.
Harris (far right), a one-time member of legendary Motown group The Temptations, died on Feb. 18, 2013. According to the Baltimore Sun, Harris (born Otis Robert Harris, Jr.) lost his 14-year-long battle to prostate cancer after spending the last three months in the hospital. He was 62. Also in the photo: Richard Street, Melvin Franklin, Otis Williams and Dennis Edwards in 1972.
The country singer was found dead in her Heber Springs, Ark., home on Feb. 17, 2013. The Cleburne County sheriff said in a statement that preliminary autopsy results from Arkansas' state crime lab show McCready's death was a suicide from a single gunshot wound to the head.
Bass player Rick Huxley, one of the founding members of the Dave Clark Five, died on Feb. 11, 2013, at the age of 72. Though the band broke up in 1970, they were inducted into the Rock and Roll Hall of Fame in 2008.
John Kerr, the stage and film actor whose credits include the movie "South Pacific," the thriller "The Pit and the Pendulum" and a Tony Award-winning turn in "Tea and Sympathy," died on Feb. 9, 2013, at the age of 81. He passed away due to heart failure at Huntington Hospital in Pasadena, Calif.
Mark Balelo, an auction house owner featured on the A&E reality TV show "Storage Wars," was found dead on Feb. 11, 2013. He was 40. His death has been declared a <a href="http://www.huffingtonpost.com/2013/02/13/mark-balelo-suicide_n_2674485.html">suicide</a>.