Rachel Zoe is launching two new top-secret categories for her clothing line in February.
The celebrity stylist - who launched her eponymous label earlier this year - will be adding to the collection but won't reveal what it will be.
She said in a video: "I'd have to kill you if I told you."
The range already included ready-to-wear, shoes and bags so it is thought she may branch out into beauty and accessories.
As well as launching her debut fashion range, Rachel - who has previously worked with the likes of Nicole Richie and Cameron Diaz - became a mother to son Skyler earlier this year and compared the collection 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.' "