Jessica Simpson has spoken out about her amazing 100-pound weight loss.

The 41-year-old Dukes of Hazzard star has been very candid with fans regarding the battles with her weight, as well as the media's long-standing coverage of her body.

This week, however, the star took to Instagram to showcase her latest achievement, and reveal the three important factors that have kept her on track.

Writing to her 5.8 million followers, Simpson captioned her most recent post: "I have gained and lost 100lbs 3x so I never thought this moment could or would happen, but I’m finally spring breakin’ wearin’ a BIKINI!!!!!!"

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In the snap, Simpson can be seen smiling as she poses in a pink paisley bikini - allowing the angle to flaunt her incredible figure.

Simpson then listed the three ingredients to her success, writing: "Hard work. Determination. Self Love."

"I enjoyed a good proud cry today," she concluded the post.

As of this writing, the post has amassed more than 158,000 likes and over 2,000 comments from proud Instagram users.

One supporter commented: "[Amazing] accomplishment-not just the weight but the self confidence. Love to see it! And you look great!!"

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A second added: "You’ve always been beautiful but more that that you have always been brave and smart!!"

"I'm so proud of you and your commitment to health and happiness! You look flawless and stunning," wrote a third.

Simpson has frequently been open and honest with her fans regarding her struggles with her weight as a media personality.

During a 2010 interview with Oprah, the actor said: People [were] talking about my weight for an entire year... It's like people just couldn't stop talking about my weight fluctuating."

[[imagecaption|| Simpson with daughter Maxwell in 2017. Credit: Image Press Agency / Alamy]]

"It would bother any woman, I would think. I had to get to a place where I had to guard myself," she continued. "The fact that I was famous last year for gaining 10 pounds, it's ridiculous, and it's really sad."

But last year, she revealed she is finally in a good place about her weight, telling Hoda Kotb on Today that she had thrown away her scales.

"I have no idea how much I weigh," Simpson explained. "I just want to feel good and be able to zip my pants up. If I don't, I have another size. I have every size."

Featured image credit: Everett Collection Inc / Alamy

Jessica Simpson stuns in bikini after losing 100lbs: 'Never thought this would happen'