People can't believe what Mia Khalifa used to look like

Mia Khalifa, an ex-adult film star and social media andsports personalityopens up about how her slender and defined shaped requires more work than meets the eye, as she contributes her share for #transformationtuesday, a widespread Instagram trend.

It seems Mia had enough people knocking her efforts down to simply 'good genes' and a 'young metabolism.' Indeed, the 27-year-old explained that her physique isn't just a matter of chance and luck, but requires a gruelling 5-day regime in the gym.

Thanks to her fitness routine, the star does not compromise her figure for her love of food and highlights the importance of 'balancing her passion.'

In a blast from the past alongside her transformation, Mia wrote:

Life is about balance. For me, it’s balancing my passion and love for food with my health. People ask me all the time how I eat so much and stay skinny – IT HASN’T ALWAYS BEEN THAY [sic] WAY AND IT TAKES A S*** TON OF F***ING WORK. It’s not “good genes,” or a “young metabolism.” It’s 5 days grinding in the gym every f***ing week so I can go on a guilt free culinary excursion every few months and be able to drown my protein in a creamy morel sauce without looking like an offensive tackle for the Washington Redskins. Anyways, the point is, work hard, eat carbs.

Back in 2014, Mia Khalifa was the most viewed actress on adult entertainment giant, PornHub. Being as popular as she was during her adult film career, the star still made the decision to kick it to the curb and carried on her fame by means of sports reporting and modelling on social media.

The former Out Of Bounds co-host now has over 21 million followers on Instagram, where she continues to share her passion for food.

And she ain't lying–work hard and eat carbs, indeed.

Check out the video above to see Mia's transformation for yourself...