Taking to Instagram, the former Towie star posted a picture of herself in her swimsuit on holiday, beside a recent one of her after embarking on a fitness regime.
While she looks amazing in both pictures, more muscle definition can be seen in the after shot.
She captioned the image: “Before I started my programme I was happy but not happy enough, with my body. I wanted to tone up everywhere & feel fit & strong. “
Jess then went on to plug her new fitness programme, Fi7ness by Jessica Wright, telling fans: “Do you feel like that?
“If so do @fi7nessbyjessicawright & not only will you feel & look better by Christmas you can also have a guilt free one by pigging out & not feel that awful January lull of ‘why have I eaten like that 😫’ bring on the mince pies my friend!”
The reality star later shared a close-up snap of her face and fans coulnd’t get over how different she looks.
One person told her: “Look abit like Kim Kardashian 😍”. Another asked: “What’s happened? This looks nothing like you 😔😢”
Earlier this year, Jess revealed she had embarked on her fitness journey after cruel trolls mocked her bikini body.
She told Lorraine at the time: “I felt awful when it happened. All these pictures came out and I was devastated.
“It’s hard, but I just say f*** them.”
And as she launched the programme, she told MailOnline: “I needed to do it for my own self confidence and own self loving.
“How can you expect someone to love you when you don’t love yourself?
“There was definitely a time in my life when I was lacking in that area. Whereas now I feel like I am completely in control of myself and where I am. I am in a happy place.”