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OTRC: Kathy Bates opens up about battle with ovarian cancer

Kathy Bates appears in a still from a March 2012 episode of 'Anderson.' (CNN)

Kathy Bates opened up about her private battle with ovarian cancer, while visiting Anderson Cooper's talk show.

The Oscar-winning actress told Cooper that she kept the health scare secret because she was under contract for a movie at the time.

"I was advised to [do so]," Bates said on an episode of "Anderson," which is set to air on Thursday, according to People magazine. "I was contracted to go into a movie at that time, 'Little Black Book' with Brittany Murphy, who I miss very much. My doctors at the time, they had to get insurance approval and all of that so I was very quiet about it and had to go back to work right away."

"Nobody else really knows what you're going through except another cancer patient," Bates continued. "Even though your family's supportive and surrounds you, I just got to the point where I would go to chemo by myself and just really go through it on my own."

The 63-year-old actress, who recently appeared in "Midnight in Paris," said she admired women who've battled cancer publicly and feels that she might be more open about her struggles if, heaven forbid, she had to face them again.

"I admire people who have been open, like Melissa Etheridge and women I see walking around facing it without wigs and all of that stuff," Bates said. "I think I'd be more courageous next time."

It was announced on March 19 that Bates will reprise Charlie Sheen's role on "Two and a Half Men," portraying the actor's ghost. Bates will guest star as the ghost of Charlie Harper on the April 30 episode, according to a statement from CBS. The ghost will appear after Jon Cryer's character, Alan, suffers a heart attack. Charlie's ghost visits Alan's bedside at the hospital.

Bates, who won an Oscar in 1990 for "Misery," is known for roles in "Titanic," "Fried Green Tomatoes" and "About Schmidt." She currently stars on the NBC series "Harry's Law," which earned her a 2011 Emmy nomination. She has also had a recurring role on "The Office."

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