"I thought my Louis costume would immediately establish me as cool, fun, and in on the joke," Lena Dunham writes

Lena Dunham Once Dressed as Louis C.K. for Halloween (and Her Genius Was Seriously Under-Appreciated)

Lena Dunham had a major Mean Girls moment in 2011.

In Tuesday’s edition of her newsletter Lenny, Dunham, 29, reminisces about her wackiest costumes of Halloweens past – like the year she dressed up as comedian Louis C.K. for a hip bash.

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“It was my first year ‘in the film industry,’ and the party I was going to seemed very elite and intimidating,” she writes. “It was full of male comedy writers, a subgroup I no longer get quite so hot and bothered by, but at the time, I considered them the height of marriage goals. I thought my Louis costume would immediately establish me as cool, fun, and in on the joke. Plus, this was Hollywood – wasn t everyone too sophisticated to fall for yet another sexy cat??”

Sadly, Dunham learned the same lesson as Lindsay Lohan‘s Cady Heron did when she showed up as a zombie bride (an “ex-wife”) in a sea of high school girls dressed in lingerie and some form of animal ears.

The Girls creator/star then ran into a “drunken starlet” confused by her getup.

Dunham writes of the cringe-worthy encounter: ” ‘Oh wow!’ she squealed. ‘You even did padding and everything!’ After which she proceeded to pinch my actual stomach flesh. Hard.

‘That s my real body,’ I whispered. And with that, I removed my bald cap and headed home.”

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Dunham also shared photos of her other iconic Halloween costume choices, including going as a blue-faced mermaid in college (“I was pretty sure this look would lead to the loss of my virginity”) and a secretary as a child (“I think I looked way too much like a teensy alcoholic divorc e to be a good candidate for candy”).