The “Charmed” actress — and vocal Harvey Weinstein accuser — tweeted about her alleged encounter with Payne, 59.

“Alexander Payne. You sat me down & played a soft-core porn movie you directed for Showtime under a different name,” she wrote early Monday. “I still remember your apartment in Silverlake. You are very well-endowed. You left me on a street corner afterwards. I was 15.”

In another tweet, McGowan posted a headshot of herself at 15.

“I just want an acknowledgement and an apology,” she said. “I do not want to destroy.”

McGowan doesn’t detail the alleged attack involving Payne, the two-time Oscar winner for “The Descendants” and “Sideways” and ex-husband of “Grey’s Anatomy” star Sandra Oh.

It would have occurred around 1988, when Payne was 27.

Payne could not be reached for comment.