Elizabeth Taylor is likely to spend several more days in a Los Angeles hospital while being treated for heart failure.
"She had a pretty good day, and a good night," her spokeswoman, Sally Morrison, said.
Ms Morrison added the 78-year-old star was resting comfortably and had been receiving family and friends at Cedars-Sinai Medical Centre.
The actress was admitted to hospital on Friday. Ms Morrison said she did not know how long Taylor would remain in the hospital but added if past treatments for her condition, first diagnosed in 2004, were any indication, it could be for several more days.
"At this stage, with her history, they're going to want to keep her in for a while just to make sure they've fixed what they needed to fix," said Ms Morrison, who did not reveal details of the treatment.
"Her family and close friends are appreciative of the warm support and interest of her loyal fans but have asked that people respect her privacy."
In 2009, Taylor, who won Best Actress Oscars for her roles in Butterfield 8 (1960) and Who's Afraid Of Virginia Woolf (1966), underwent heart surgery to repair a "leaky valve".
She tweeted afterwards: "It's like having a brand new ticker. Thank you for your prayers and good wishes. I know they all helped. Love you, Elizabeth."
The actress has endured many health scares.
She had near-fatal bouts of pneumonia in 1961 and 1990. She has battled substance abuse and weight gain. Both her hip joints were replaced in 1994 and 1995.
She's also been struck by ulcers, amoebic dysentery, bursitis, and had a benign brain tumour removed in 1997.
In recent years, she has been pictured in a wheelchair when out in public.
Taylor also wrote a flurry of tweets in July 2010. "I've been hearing all kinds of rumours about someone being cast to play me in a film about Richard [Burton] and myself... No one is going to play Elizabeth Taylor, but Elizabeth Taylor herself... Not at least until I'm dead, and at the moment I'm having too much fun being alive."