The celebrity stylist is to showcase her debut fashion collection at the prestigious event this month and admits she's getting rather nervous.
She told website FabSugar: "Nervous, excited, petrified, anxious, terrified . did I mention terrified? I'm terrified."
However, she is excited about her upcoming spring 2012 runway show and can't wait to see the reaction it gets.
She said: "I think becoming a designer was that sort of thing that was inevitable on some level, and then also something that I really waited a long time to do because the timing had to be right. I just felt this was the time I was ready to do it.
"It is one of the scariest and most challenging things I've ever done, but also kind of the most exciting."
Rachel - who welcomed son Skyler into the world five months ago - recently compared her debut fashion range to "giving birth".
She said: "Being a designer was the thing that I always said, 'I'm never going to do this, because I'm too scared to do this'.
"All of sudden during my presentation this season, I was like 'Oh my god, why am I doing this, I'm too scared to do this. Then it was like, it was almost like giving birth.
"When it was over, I was like, 'This is the most exciting, most challenging adventure. This is new, and this is fun.' "