Stephanie Pratt admits to having a meth addiction as a teen in her "Made in Reality" memoir.

The 29-year-old former "The Hills" star revealed she often smoked crystal meth a dozen times a day as a teenager in the new book.

Pratt also frequently used cocaine, and struggled with bulimia after she became sober.

"I was 14 or 15 [when I first smoked meth]," she confessed.

"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."

Pratt recalled not caring "about anything" during her addiction, writing, "I could live or die, I didn't care. I had nothing to get out of bed for, nothing was exciting."

The troubled star was arrested in 2006 for attempting to steal $4,000 worth of clothes while on drugs.

Pratt started to turn her life around after joining MTV reality series "The Hills" in Season 3.

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Pratt previously told MTV the show, which also starred her brother Spencer Pratt, gave her an opportunity to "get healthy" and "be a role model."

"Made in Reality" was released online and in bookstores last week.

Pratt currently stars on the British reality series "Made in Chelsea," which returned for a new season Aug. 10.

The star has since been accused of lying about her addiction to garner interest in the show.