The 16-year-old has been unveiled as the face of Burberry Beauty's new Liquid Lip Velvet collection, in a move that's sure to cement her status as a rising star in the modelling world.
"So honoured and excited to have become part of the @Burberry family as the new face of Burberry beauty #LiquidLipVelvet," the teenager wrote on Instagram.
The new Liquid Lip Velvet is a matte cream lip colour that combines rich pigment with a comforting texture that lasts for up to eight hours.
It's the latest modelling gig for Iris, who was reported to have signed a lucrative contract with Chanel back in September.
She follows in the footsteps of her big brother Rafferty, who has been making a name for himself in the fashion industry and recently walked the catwalk for Dolce & Gabbana.
Iris recently admitted her love of fashion and personal style is inspired by her mom Sadie Frost, who herself was once a model.
"I like looking at pictures of my mom when she was around my age and seeing her make-up and little dresses," she told Teen Vogue.
"I was always really interested in what she was wearing growing up and did quite creative things with how I dressed myself."
Iris also opened up about her personal style, listing Miu Miu, Gucci and Chanel among her favourite designers.
"I really like vintage blouses with feminine lace detailing – I'll usually wear them with black trousers and trainers," Iris told the magazine in the accompanying interview. "I also usually have rings on every finger apart from the thumb. Most birthdays or Christmases my dad will get me a ring from Annina Vogel."