Sarah Ferguson, the Duchess of York, attributed her recent 30-pound weight to a "blended" diet and intense running and mountain-hiking workouts, the Express.
“I went up to the mountains, and I ran every day," said Ferguson whose diet combined several different eating plans. "That’s how I got fit."
Now that she's thinner and healthier, Sarah is committed to helping fight the global obesity epidemic.
“I may have lost 30 pounds, but I want to help combat global obesity," said Ferguson, 54. “I want to really get into America and support young children who need to be educated about the future.”
The 5-foot-8 Ferguson, who once tipped the scales at over 220 pounds, has been following her strict fitness regimen since October 2013, with the help of her trainer Josh Salzmann.
Sarah, whose weight has fluctuated dramatically over the years, previously detailed her weight struggles in her book Win the Weight Game.
Ferguson isn't the only royal who has undergone a dramatic weight-loss transformation. In 2012, her daughter, Princess Beatrice, made headlines after losing 30 pounds by running and following a low-calorie diet.
Similarly, the Duchess of Cambridge, Kate Middleton, raised eyebrows after losing 29 pounds just two months after giving birth to son George. Middleton reportedly followed a low-carb diet and did yoga and running workouts to achieve her rapid weight loss.