Brittany Murphy, the bubbly, free-spirited actress who appeared in films including "Clueless" and "8 Mile," has died, Los Angeles police and hospital officials said Sunday. She was 32.

Murphy was pronounced dead at 10:04 a.m. PT Sunday at Cedars-Sinai Medical Center, hospital spokeswoman Sally Stewart told CNN Radio.

Actress Brittany Murphy was rushed to the hospital Sunday morning. She was pronounced dead on arrival.

An autopsy on the body of actress Brittany Murphy was conducted Monday, the Los Angeles County coroner's office said.

Authorities have said the 32-year-old appeared to have died Sunday of natural causes, and there was no sign of foul play or trauma.

"Naturally occurring diseases could be found in any person that could lead to death," said Capt. John Kades of the coroner's office.

The office is looking into Murphy's medical history. A final report could take up to eight weeks. The cause of death will not be released until the toxicology report is concluded, said the coroner's office. That process can take weeks.

The Los Angeles Police Department is investigating the death, and robbery and homicide detectives will be at her home, LAPD spokeswoman Norma Eisenman said. No other details were immediately available.

"In this time of sadness, the family thanks you for your love and support," Murphy's publicist, Nicole Perna, said in a statement. "It is their wish that you respect their privacy."

Murphy starred in several movies, including "Just Married," "Don't Say a Word" and "Riding in Cars with Boys." She also voiced the character Luanne on the animated TV series "

She is survived by her husband, British screenwriter Simon Monjack, whom she married in 2007.

Fans took to Murphy's official Facebook page Sunday to issue their condolences.

"She was a great actress and was going to go far in her career! She will be greatly missed!" read one post.

Murphy's former boyfriend and "Just Married" co-star Ashton Kutcher posted his reaction to the news via Twitter.

"2day the world lost a little piece of sunshine. My deepest condolences go out 2 Brittany's family, her husband, & her amazing mother Sharon," Kutcher posted.

He added later: "see you on the other side kid."

Singer-actress Jessica Simpson tweeted: "Brittany Murphy was an incredible ray of Light to so many people. Her smile was contagious. My prayers are with her family and loved ones."

Actress Alyssa Milano, who did a USO tour with Murphy in 2003, wrote on Twitter: "She was a sweet soul, with a lot of talent and heart."

Murphy was best known for her work in a string of romantic comedies in the early 2000s, including lead roles in "Uptown Girls" alongside fellow Georgia native Dakota Fanning, and "Little Black Book" with Holly Hunter and Kathy Bates.

In addition to her "King of the Hill" role, she lent her voice to a number of animated works including the TV series "Futurama" and the 2006 hit movie "Happy Feet."

Her work as troubled teenagers in "Don't Say a Word" and "Girl, Interrupted" also gained her critical acclaim.

Murphy was the subject of tabloid gossip after she transformed from a pudgy brunette in 1995's "Clueless" to a petite, lithe blonde who graced the cover of such magazines as Cosmopolitan in 2005. She frequently denied rumors of an eating disorder and plastic surgery.

Her love life also was fodder for gossip sites as she broke two engagements in 2004 and 2006, then married Monjack after only four months of dating.

"All these ridiculous people came out and said all this nonsense when we got married, [but] thank God we had the substance and the history within that to [say], 'Yeah, whatever!' " Monjack told People magazine in a 2008 interview. "We still don't understand what happened. It's made us laugh, it's made us cry, but it's made us stronger."