Pamela Anderson is telling all in an upcoming memoir.

And some of that “all” involves disturbing allegations against conservative darling and actor Tim Allen.

According to Anderson, then-37-year-old Allen flashed her in 1991 while on the set of “Home Improvement” when she was 23 years old.

According to an excerpt, Pamela Anderson wrote, “On the first day of filming, I walked out of my dressing room, and Tim was in the hallway in his robe. He opened his robe and flashed me quickly – completely naked underneath. He said it was only fair because he had seen me naked. Now we’re even. I laughed uncomfortably.”

Allen was presumably referring to Anderson’s prior modeling for Playboy.

Tim Allen has denied the allegation, telling Variety, “No, it never happened. I would never do such a thing.”

Anderson is releasing the memoir, “Love, Pamela,” on January 31, detailing her rise from small-town Vancouver gal to international superstar.