Lena Dunham admits she crossed 'boundaries of professionalism' as she reveals she once 'made out' with a Girls guest star 

Lena Dunham says she 'made out' with a guest star on her hit show 'Girls'.

The 30-year-old actress - who is now in a relationship with musician Jack Antonoff - made the revelation during TimesTalks: A Final Farewell to the Cast of 'Girls' event on Wednesday in New York City. 

The star, who was single during the first season of the show, admitted she crossed the 'boundaries of professionalism' with the unnamed actor.

Confession: Lena Dunham says she 'made out' with a guest star on her hit show 'Girls'

She confessed: 'I did make out with a day player actor on our show in the first season. Before we understood the full boundaries of professionalism.

'I was like, "You've been on set for eight hours. You seem interested in me and my power. I would love to go to the 11th Street Bar with you."'

However, Lena said that she quickly realised meeting up with her co-star outside of filming wasn't a good idea and felt she was acting like 'the grossest male producer'.

Revelation: The star, who was single during the first season of the show, admitted she crossed the 'boundaries of professionalism' with the unnamed actor

She continued: 'Then I kind of got there, I was like, 'Oh wow, this person doesn't even think I'm cute.' He's just like, "She runs a TV show and I'm actor." I was like, "This is a nightmare. I've inadvertently become the grossest male producer."'

And she says her realisation made her resolve that she wanted to 'commit to the same person for the rest of [her] life' afterwards.

Also during the discussion, Lena shared her hope that Girls has depicted female friendships accurately and taught women that it is OK to be flawed.

Open: The 30-year-old actress - who is now in a relationship with musician Jack Antonoff - made the revelation during TimesTalks : A Final Farewell to the Cast of 'Girls' event on Wednesday in New York City (pictured with moderator Jenna Wortham and co-star Jemima Kirke)

Boundaries: She confessed: 'I did make out with a day player actor on our show in the first season. Before we understood the full boundaries of professionalism'

Not for her: Lena said that she quickly realised meeting up with her co-star outside of filming wasn't a good idea and felt she was acting like 'the grossest male producer'

She said: 'I hope that it helps people think of women as messy and complicated, containing multitudes.

'That it's OK for women to be unsure and impolite...One of the big goals when we started the show was to really talk about female friendship in a really honest way, because in so many films we see, they're depicted as they're depicted as this sort of "ride or die," support of perfection, or catty fighting.

'The truth of female friendship is that it's a really deep love that lies between those things,' she concluded.  

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