Demi Moore Quits Lovelace Biopic; Will Chloe Sevigny Replace Her?

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Despite rumors of substance abuse and anorexia, Moore's rep stated that the hospitalization was due to "stress."

"Demi has chosen to seek professional assistance to treat her exhaustion and improve her overall health. She looks forward to getting well and is grateful for the support of her family and friends," Moore's rep told TMZ.

In November, Moore filed for divorce from Ashton Kutcher after six years of marriage. Kutcher, 33, had reportedly cheated on Moore with Sara Leal, 22.

"As a woman, a mother and a wife there are certain values and vows that I hold sacred, and it is in this spirit that I have chosen to move forward with my life," Moore said in a statement at the time.

"Lovelace," which began production in L.A. in December, also stars Hank Azaria, Bobby Cannavale, Chris Noth and Peter Sarsgaard. In late December, James Franco was close to signing a deal with "Lovelace" producers to play Playboy boss Hugh Hefner. No word on whether or not the deal went through.

"Lovelace" tells the story of Linda Lovelace, the woman who became the most famous porn star of her time thanks to the 1972 porn film "Deep Throat." Lovelace later joined the feminist anti-pornography movement before contracting hepatitis from a blood transfusion. She died in 2002, at the age of 53, after succumbing to injuries from a car accident in Denver.

Sevigny's last major project was the HBO series "Big Love," which wrapped in March 2011 after five seasons. Seyfried was also in that show.

"Lovelace," directed by Rob Epstein and Jerry Friedman, will most likely have a late 2012 release.