Sarah Ferguson weight loss 2014: How Fergie dropped 5 lbs in 5 months

Sarah Ferguson has shed an incredible 50 lbs in just five months.

Fergie, formally known as the Duchess of York, showed off her noticeable weight loss in a sheer black dress at The Theory of Everything UK premiere on December 9.

Sarah Ferguson, a former Weight Watchers ambassador, has always been public about her struggles with weight, and recently revealed to Hello! magazine the motivation behind her newly slimmed-down physique.

Fergie, 55, says that she knew she had to make a change when she discovered that she weighed almost the same as when pregnant with her first daughter, Princess Beatrice, who is now 25.

“That’s what really frightened me,” she says.

“Beatrice was an 8lb 8oz baby and I was only 6lb off my full-blown pregnancy weight. I decided to make a change.”

Sarah Ferguson dropped the extra pounds by cutting out sugar and sticking to a “straightforward” exercise regime.

“I used to be so angry,” Fergie tells the magazine about her initial struggle.

“I believed I was never going to lose the weight, that I had lost control. I couldn’t fit into any of my clothes. I was just drowning in eating, drowning in food.”