Melissa Joan Hart is planning to release an explosive tell-all book about her life, which will reveal new shocking details about her past drug use.

According to Life & Style, who've obtained a copy of Melissa Explains It All, on shelves Oct. 29, the actress dishes about her drug-fueled nights in Hollywood.

"I experimented with weed, Ecstasy, mushrooms and mescaline for about a year and a half," Melissa admits to the magazine.

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She even admits to heading to a Maxim photo shoot while still high! “That was my third or fourth time on Ecstasy," she reveals.

Hart also alleges that socialite Paris Hilton offered her cocaine, but she turned her down.

"I was kind of running with a bad crowd,” she explains. "I just didn’t enjoy taking drugs. I don’t like the loss of control."

Hart has three sons -- Mason, 7, Brady, 5, and Tucker, 9 months -- with her husband, Mark Wilkerson.

She currently stars on Melissa & Joey, with actor Joey Lawrence.