Diane Keaton discussed her struggle with bulimia during an appearance on "Dr. Oz" May 8.
The 68-year-old said she suffered from the eating disorder in her twenties, sometimes consuming up to 20,000 calories a day and then purging.
She looks back on that time as the "lowest point in [her] life," adding: "I was an obese person who had somehow tricked myself and managed to hide it."
Keaton continued that she considers herself an addict in recovery, saying, "All I did was feed my hunger, so I am an addict. It's true. I'm an addict in recovery."
The actress first revealed her battle with bulimia in 2011, in her memoir titled "Then Again." Keaton recently released a second memoir, "Let's Just Say It Wasn't Pretty."