In her autobiography, out now, Steph has revealed that her teens were actually some very dark days, where the star became addicted to smoking crystal meth.
Explaining that doing the highly addictive drug, that is a class A in the UK, made her feel rebellious, Steph admitted she also did cocaine at the same time.
'I was 14 or 15 .... I was on the extreme level and addiction developed instantly.
'(I smoked) probably four times before school, then at snack... probably 12 or 13 times a day.’
The 29-year-old, who shot to fame on American reality series The Hills, says her disregard for her safety came from a deep rooted depression.
‘I didn’t care about anything. I could live or die, I didn’t care.’
But in 2006, everything came tumbling down when Steph was arrested by police in Hawaii, as she tried to steal designed clothes while high.
After rehabilitation however, Stephanie turned her life around, landing a role as a cast member on The Hills, where her brother Spencer was already present.
In 2013, Stephanie joined the cast of MIC, and has now purchased a house in London. her autobiography, Made in Reality, is out now.