Oprah WinfreyOprah Winfrey has admitted she’s “fallen off the wagon” when it comes to healthy eating and she now weighs 200 pounds (14stone 4lbs).

Writing in her new issue of O magazine, she said: “I’m mad at myself… I’m embarrassed… I can’t believe that after all these years, all the things I know how to do, I’m still talking about my weight. I look at my thinner self and think, ‘How did I let this happen again?’”

She explained that her problems began when she was diagnosed with a thyroid imbalance last year and it gave her a “a fear of working out”: “I was so frustrated I started eating whatever I wanted - and that’s never good.

“When it comes to maintaining my health I didn’t just fall off the wagon. I let the wagon fall on me. I didn’t follow my own fundamental rule of taking care of self first.”

She added the weight gain means she’s had to start looking for a new gown for President-elect Barack Obama’s inaugural ball next month: “I had a dress on the vision board, but I’m not sure that’s gonna fit. So I have to work on something else.”