The scent was launched this summer and retails for $65 and $85 at Saks Fifth Avenue, USA Today reports. Among its celebrity fans are Julia Stiles, Emmy Rossum and Marcia Cross.
The teen model made her runway debut for designers Dolce & Gabbana in Milan in February 2004, a month after she signed with Dior.
Although she has musical blood running through her veins, the King's granddaughter told USA Today she has no immediate plans to record an album.
"I was lucky," she said. "I got this amazing opportunity so young, but I have lots of things I want to try and want to pursue, and I guess, lots of things yet to learn."
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