Designer Rachel Antonoff has been getting a lot of traction in Hollywood lately, thanks to her whimsical, offbeat, yet totally chic threads. But Rachel isn't the only one in her family making headlines. Fun fact: Rachel's brother is none other than fun. guitarist Jack Antonoff!

Hollywire's very own Chelsea Briggs was backstage before Rachel's show at New York Fashion Week and she chatted with Rachel about her supportive, collaborative relationship with her bro Jack. He even put together the music for the show! 

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When we were backstage drooling over Rachel's clothes, we spied Jack rushing around helping to prep his music for the show. He was looking hipster-cute as ever. No wonder he's so stylish with a sister like Rachel. 

Rachel said of her brother, "[Jack] is my best friend, my biggest support and my biggest inspiration too. We've always been a great team." So sweet. Mom and Pop Antonoff must be proud.

Rachel had mentioned in another interview that she's a fan of One Direction, but she set the record straight with Chelsea. "I think I overstated that," she said. "I listened to that single on repeat for a day, and that was it! I think one of them is really cute. I think if you only know one song you can't really call yourself a fan." Probably fair. And I don't think anyone can resist putting What Makes You Beautiful on repeat for a day. But we're assuming most days, she's hitting the repeat button on We Are Young.

Stay tuned for the rest of Hollywire’s coverage of New York Fashion Week!

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