"My sister, Grace, coming out as a gay woman at age 17 was a huge turning point for me in my understanding of the issues facing LGBTQ people," Dunham went on. "We were raised in an environment, the art world of downtown Manhattan, where no one hid their sexual orientation and a common question from 4-year-old me was, ‘Mom, are those ladies gay together?' I was always very jealous of any child who had two dads. And because of our parents' deeply held commitment to acceptance and equality, my sister's process of coming to terms with her sexuality was as angst-free as anything involving sex can really be. She was assured by the adults in her life that she was not only accepted but adored for who she is. I am so happy that this is the way she was able to enter the world as a woman and an LGBTQ person."

Dunham also said she's happy to work on her series Girls where she's surrounded by a diverse cast and crew.

"I love my job. I feel insanely lucky to work with talented individuals from all walks of life, who define themselves in beautiful and unusual ways," she said. "Our goal on Girls is to show you non-stereotypical examples of the range of people who inhabit this amazing city, and we are learning more about what that means every day."