Some of you might know Grace Dunham, Lena Dunham's 23 year-old sister, from Lena's indie film Tiny Furniture.
She looks COMPLETELY different now though (this was her in 2010) .
For those of you that don't, she's a poet, activist and actress (yep, she's been confirmed to appear on the upcoming season of Girls).
Last night, Grace made her modelling debut at New York Fashion Week, walking in one of the coolest catwalks in town, Eckhaus Latta.
Eckhaus Latta was founded in 2011 and is known as an underground fashion favourite.
The label are famous for using trans-gender models and are widely known for its sustainability and performance art-like presentations.
"I'm friends with Mike (Eckhaus) and Zoe (Latta)," Dunham told Elle following the show.
"I know them from around, and they just reached out and asked me if I wanted to do it."
But it seems like Grace didn't have a very eventful trip down the catwalk!
"I didn't have my glasses on, so I couldn't see anything."
"I was trying to think about what Mike said. He was like, 'Chain from the top of your head to the ceiling, shoulders back, walking like you're like you're listening to music."
In the show, Grace took part in #freeingthenipple campaign, but it didn't stop her from killing it on the runway.
"It was cool; I don't mind showing my boobs," she said.