Actress/director Lena Dunham has spoken out against plans to make a porn parody of her hit TV show Girls, insisting the video goes against the series' feminist ideology.

Executives at Hustler have commissioned an adult film version of the show called This Ain't Girls XXX, with porn stars taking on the characters made famous by Dunham and her castmates.

However, Dunham, who created the show, is adamant she can't just laugh off the porn tribute as she finds the idea deeply troubling.

In a serious of posts on her Twitter.com page, she writes, "I wish I had a better attitude about the Girls porn parody. I really can never predict what will trouble me and it's simply exhausting... Okay, I wracked my brain to articulate why I can't just laugh off a porn parody of Girls and here are 3 reasons... 1. Because Girls is, at its core, a feminist action while Hustler is a company that markets and monetises a male's idea of female sexuality... 2. Because a big reason I engage in (simulated) onscreen sex is to counteract a skewed idea of that act created by the proliferation of porn... 3. Because it grosses me out."

She adds, "It's important to me to be honest about the complexities of having that (porn parody) out in the world. Love, Lena (porn name: Murray Broadway)."