Melissa Joan Hart talks past drug use, partying

Cindy Clark | USA TODAY

Melissa Joan Hart is a happily married mother of three, but she's spilling secrets from her past growing up as a child actor.

The former star of Nickelodeon's Clarissa Explains It All writes in a new tell-all book about past drug use and steamy makeout sessions with co-stars — and she's naming names!

"I experimented with weed, Ecstasy, mushrooms and mescaline for about a year and a half," Hart tellsLife & Style. In her book, Melissa Explains It All, out Oct. 29, she writes of taking Ecstasy at the Playboy Mansion in 1999, making out with a girl in the limo ride home — and then heading to a Maxim photo shoot while still high. "That was my third or fourth time on Ecstasy," reveals Hart.

The 37-year-old actress says she "was kind of running with a bad crowd." In fact, she claims when Paris Hilton offered her cocaine, she turned her down (a rep for Paris denies the claim). "I just didn't enjoy taking drugs," says Hart. "I don't like the loss of control."

Hart goes on to talk about making out with Jerry O'Connell (calling him a "man-whore") and Backstreet Boy Nick Carter. But she never fell under the spell of Ashton Kutcher: She twice tried to kick him out of her parties for making "smartass remarks."

"Ashton and I just didn't get along," she recalls.