According to the Sun, the actress had also admitted to having had breast augmentation surgery earlier this year, and having gone under the knife twice.
"(I had) a boob job. There it is. I finally said it. I wanted to come clean that I had my boobs done in my 20s, because people falsely write that I've had all those things done," the NZPA quoted her as saying.
"I've had the two procedures that probably every other woman in Hollywood has had done," she added.
The Beverly Hills 90210 star wed her husband Dean in 2006, and they have two children together.