The pair dated for 13 years before they split in May 2000 and the 51-year-old actress said they have managed to maintain a close friendship and are still "best friends", reported Entertainment Tonight.
"We are best friends. We look out for each other," she said.
Meanwhile, talking about the secret of her fitness, Elizabeth said she does not have a mantra for staying in shape.
"I don't think there is any secret, really, is there? We all know, it's not going to bed too late, not drinking too much alcohol, eating lots of vegetables, all those sorts of things.