Jessica Simpson reached her weight loss goal and she's letting the world know how proud she is.

Jessica Simpson Talks Weight Loss On Good Morning America

Simpson shared her accomplishment via Instagram on Mach 6 by uploading a photo of herself in a skin-tight dress.

"First time rocking a white dress this year ...but not the last!! Thanks @weightwatchers!" she wrote as the caption.

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The 33-year-old, who is a Weight Watchers ambassador, also appears in a promo video for the brand wearing the aforementioned white dress. In the clip, the star speaks about how important it is to have a support system when trying to lose weight.

"It's so much better to have some backup and to do it together because we all face similar challenges," she said about the Weight Watchers meetings.

"The meetings keep me focused and motivated and I have a newfound determination that I'm really proud of. I can honestly say I've never been happier."

The singer turned fashion designer also visited Good Morning America in January and revealed that her two children with fiance Eric Johnson -- Maxwell and Ace -- were her motivation to get healthy.

"As a mom, I just have this confidence and I just feel so proud of what I've done and what I've accomplished," she said. "And I really do also feel this need to just be the best role model for my children... I want [Maxwell] to look up to me and want to be like me."