UPDATE: A coroner’s official says Murphy may have died of natural causes.

Actress Brittany Murphy, best known for her work on 1995’s Clueless, was pronounced dead today in Los Angeles. She was only 32.

According to reports, Murphy was discovered unconscious by her mother in her shower. A call from the home of Simon Monjack, Brittany’s husband of 2 1/2 years, was made around 8:00 AM.

Paramedics attempted to revive the 8 Mile star who had apparently gone into cardiac arrest. Unfortunately, she was pronounced dead on arrival at Cedars-Sinai Medical Center.

Although Brittany has not starred in any big screen hit in some time, she had been the subject of recent tabloid talk. In late November, Murphy was replaced on a film being shot in Puerto Rico. It was rumored that that Brittany and Simon’s questionable behavior - including possible drug use - was behind her dismissal. This recast lead to an SNL skit on December 5. (You can view that clip after the jump.)

It was during their return flight from The Caller set that Monjack became the subject of his own 911 call. Airline officials reported at the time that he had “stopped breathing” at one point.

Eerily enough, a very thin Brittany engaged in strange behavior during an April appearance on the Late Late Show with Craig Ferguson. (That video can be seen below.) The actress - who is of Irish descent - adopted an accent for her visit and denied being a drinker. “I don’t like the way it make me feel. I like to stay grounded like this.”

Upon hearing the news about Murphy’s passing, ex-boyfriend Ashton Kutcher tweeted this message: “2day the world lost a little piece of sunshine. My deepest condolences go out 2 Brittany’s family, her husband, & her amazing mother Sharon.”

Brittany also starred in Sin City, Don’t Say a Word and did voice work for King of the Hill.