Actror Diane Keaton has revealed how she fought a five-year battle with bulimia.The 65-year-old has admitted how she used to devour entire tubs of ice-cream before making herself sick, reports express.co.uk.Keaton was just 19 when she fell under the grip of the eating disorder in a desperate attempt to stay slim.It’s a horrible problem, ugly and awful,” she said.The actor wasn't aware that this condition had a name and suffered for several years until therapy helped her get better.