Jessica Hart has found it "hard" being "on all the time".
Jessica Hart
The 30-year-old model - who was scouted at the age of 15 years old - believes the Victoria's Secret models are always focused, and the blonde beauty has admitted she has finds it hard to have the same mentality and be "cute and sexy" at every moment.
Jessica - who graced the catwalk for the lingerie giant in 2012 and 2013 - told Hello! Fashion Monthly: "Those Victoria's Secret girls are on all the time and I'm not. I like to just do my thing and go home. I have a hard time being on all the time, being cute and sexy, hamming it up."
And the catwalk icon has revealed she hasn't always been uber feminine and has described her younger self as a "tomboy".
Speaking about herself as a child, Jessica - who is currently dating Stavros Niarchos III - said: "[I was] a tomboy, into Snoop Dogg.
"At the age of 14, even younger, I was a loose cannon. I'd run away and steal her car - I gave my mum hell. I wouldn't be willing to admit half of the things I did."
However, Jessica hasn't ditched her hobbies, which are typically associated with men, and has revealed she has a passion for BMX bikes and repairing the sporting equipment.
She explained: "So we [Jessica and her friend] decided to get on eBay and start buying old-school parts and building them. You should see me riding through New York, It's like, intense. And you don't have to wear a helmet. You've just got be really fast. It's not a smart idea."
And the star has proved to be an adrenalin junkie, as she shared a picture of her prior to jumping out of a plane on her Instagram account earlier this week.
She captioned the post: "I can assure you I did not jump out of the plane with this much enthusiasm ... but it was FUN ! (sic)."