Brittany Cartwright in a swimsuit after losing almost 40lbs since welcoming her first child

Vanderpump Rules star Brittany Cartwright posted a pinup photo this week to Instagram that lit up her page.

The 33-year-old reality TV siren said in her caption, ‘Sunshine & Positive Vibes! I feel incredible!’

This comes after she said she has lost a whopping 39lbs after welcoming her first child, son Cruz, with her husband Jax Taylor.

In January she teamed up with Jenny Craig which has helped her with weight loss.

‘I’m down 39lbs!! Woo hoo,’ wrote Brittany, who shot to fame alongside Jax during their time on Vanderpump Rules. 

She took the show to her main Instagram page, where she posted a behind-the-scenes video montage from her latest Jenny Craig shoot.

Brittany treated her more than million and a half followers to a few glimpses of the various outfits she modeled for the shoot, which took place at home.

She stood for the shutterbugs out in the backyard, showcasing looks ranging from a busty lace floor-length gown to a sleek cocktail dress.

Her new photo-shoot also allowed her to go California casual in a tank top and Daisy Dukes as she posed by her kitchen island with some Jenny Craig foods.

‘I’m feeling great!’ she gushed in the caption of the post, where her husband Jax Taylor leapt into the comments and wrote: ‘Hot wife alert!!!’ 

Jax and Brittany began dating in 2015 and the ups and downs of their relationship unfolded in front of reality TV cameras on Vanderpump Rules.

Although they broke up at one point because of his infidelity with their co-star Faith Stowers, they eventually patched up their relationship and married in 2019.

They welcomed their bouncing baby boy Cruz in April 2021, and Brittany proudly posts frequent pictures of him to her Instagram.

Brittany, who grew up on a farm in Kentucky, teamed up with Jenny Craig in January and embarked on their Max Up weight loss program.

When she first signed onto Max Up, an official press release announced that she intended to take off at least 30lbs, a goal she has now exceeded.

She eventually announced that that after she adopted the Jenny Craig program, she lost a whopping 22lbs in just 11 weeks. 

Celebs ranging from singing stars Mariah Carey and Jennifer Hudson to sitcom stars Valerie Bertinelli and Jason Alexander have endorsed the brand in the past.