The Oscar-winning actress underwent surgery to repair a leaky heart valve earlier this week, and has taken to her Twitter page to reassure fans she is recovering well.
She wrote: Dear Friends, My heart procedure went off perfectly. It's like having a brand new ticker.
Thank you for your prayers and good wishes... I know they all helped. Love you, Elizabeth (sic).
Elizabeth had the operation in Los Angeles, but the exact medical centre is unknown.
The 77-year-old star announced she was checking into hospital on Twitter, asking her fans to pray for her quick recovery.
She wrote: Dear friends, I would like to let you know before it gets in the papers that I am going into the hospital to have a procedure on my heart.
"It's very new and involves repairing my leaky valve using a clip device, without open heart surgery, so that my heart will function better.
"Any prayers you happen to have lying around I would dearly appreciate. I'll let you know when it's all over. Love you, Elizabeth."
The Hollywood legend battles several health problems, and regularly appears in a wheelchair when she is in public.