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"I used to get really anxious and nervous and fearful about certain things," she told Daily Mail Australia.
And those things had a lot to do with the way she looked. Admitting that she had insecurities about her appearance, Hart also revealed that her "fears" were related to "body image or about trying to be something I wasn't."
Her anxiety was also heightened by the fact that she was travelling so much. "Even just the stresses of making flights or staying in places that are new to me, or adapting to the constant changes every day, and week, and months," she confessed.
Of course, the fact that a model could feel so much stress about the way she looks highlights a bigger problem with society and the unrealistic standards of beauty placed on women — even Cara Delevingne admitted during an interview with The Times, that the modelling industry had a devastating effect on her self-esteem and body image. So, it's no wonder women are developing fears and image-related problems about their bodies.
However, Hart has found a way to reduce the level of stress and anxiety in her life — through mediation and yoga — which she says has changed her life "in every way."
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"I'm conscious of what physically works for my body and what doesn't like sugar or alcohol or the extremes of over eating or not eating, everything has just come back into balance and it's just happened naturally," she told the publication.
Speaking about her insecurities (although briefly) in public is a courageous thing to do, and can hopefully facilitate two changes: one, we (as women) stop striving to achieve unattainable beauty, and two, we realize that we are all perfect the way that we are.