Actress Melissa Joan Hart is releasing a tell-all book where she opens up about her hardcore partying past which she admits included some very heavy drug use.

The book is titled “Melissa Explains It All” which is a play on the name of Hart’s popular 90s TV show “Clarissa Explains it All.”

"I experimented with weed, Ecstasy, mushrooms and mescaline for about a year and a half," the 37-year-old told Life & Style. 

The star also spoke about one of her messier nights out which included taking Ecstacy at the Playboy mansion, hooking up with a woman in a limo and then heading to a photoshoot while she was high.

“That was my third or fourth time on Ecstasy” she said.

The Sabrina the Teenage Witch actress said that her partying past was greatly attributed to the group she was with at the time saying, “I was kind of running with a bad crowd."

However, some time after her years in Hollywood, Hart said that she no longer enjoyed taking drugs.

“I don’t like the loss of control."

The now mother of three, also told the magazine that she hooked up with stars like Jerry O’Connell, Nick Carter and Ryan Reynolds while also admitting that she cheated on her boyfriend.

Another story from the book involves Paris Hilton, who Melissa claims offered her cocaine, which she refused. Hilton’s rep denies the allegation.

Her memoir, Melissa Explains It All: Tales From My Abnormally Normal Life, hits shelves on October 29^th.