Actress Brittany Murphy, who starred in such films as Just Married and 8 Mile but suffered waning fortunes in recent years, died on Sunday, officials said. She was 32.

Murphy was pronounced dead at Cedars-Sinai Medical Center near Beverly Hills after reportedly going into cardiac arrest at her home in West Hollywood.

Online gossip site TMZ said her mother, Sharon, discovered Murphy unconscious in the shower. The Los Angeles Fire Department said it responded to an emergency call about 8 a.m. PST.

Murphy starred in films opposite Michael Douglas, Ashton Kutcher, Eminem and Angelina Jolie, but failed to attain their level of success. In recent years, she worked mostly in low-budget movies, while her emaciated appearance sparked concerns about her health.

(Today) the world lost a little piece of sunshine, Kutcher, a former boyfriend, wrote on his Twitter page. (S)ee you on the other side kid.

Her publicist declined comment, saying the family wanted privacy.

Murphy was in the news earlier this month when she reportedly was fired from the Puerto Rico set of the indie thriller The Caller. Her publicist said the split resulted from creative differences. When Murphy and her husband of two years, British screenwriter Simon Monjack, returned to Los Angeles, he lost consciousness on the plane and was rushed to hospital.

Murphy was last in theaters with the low-budget thriller Across the Hall, which opened in one theater each in New York and Los Angeles two weeks ago. She recently finished work on the Sylvester Stallone action film The Expendables.

Murphy was born in Atlanta on November 10, 1977, and raised in New Jersey. Accompanied by her mother, she moved to Los Angeles in the early 1990s in hopes of stardom.

She made her breakthrough in the 1995 feature comedy Clueless, playing one of Alicia Silverstone's girlfriends. She built on her momentum with a succession of TV roles and appeared in two films in 1999 -- Drop Dead Gorgeous and Girl, Interrupted, for which Jolie received an Oscar.

Murphy worked with Douglas in the 2001 thriller Don't Say a Word, and played Eminem's love interest in the 2002 hit 8 Mile.

The following year, she co-starred with Kutcher in the romantic comedy Just Married, and played Dakota Fanning's babysitter in Uptown Girls. But the movies failed to generate much commercial or critical heat. Her last major role was in the 2005 comic-book adaptation Sin City.

Murphy enjoyed more enduring success on the small screen, providing the voice of the vacuous Texan Luanne Platter in the cartoon series King of the Hill. She also voiced a penguin in the 2006 box office hit Happy Feet.