If you don't know the name of model Kaia Gerber, where have you been hiding?

After making her modelling debut at SS17 Fashion Month last September, the 16-year-old star has gone on to create a design collaboration with Karl Lagerfeld and walk in several of last week's NYFW shows for the likes of Anna Sui, Calvin Klein, Coach and Alexander Wang.

However, we're not quite sure we love the Californian beauty as much as her brother Presley, who just had the brunette's name permanently tattooed on his arm.

On Thursday, the male model visited celebrity favourite tattoo haunt Bang Bang Tattoos in NYC and had 'Kaia XXIII' inked on his left tricep.

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Presley posted a picture of the tattoo, written in lowercase script and roman numerals, to Instagram with the caption '23'. Tattoo artist Jon Boy was the mastermind behind the tattoo, who has inked the likes of Kendall Jenner, Bella Hadid and Ashley Graham.

Kaia witness her brother's devotion to her first hand and posed for a picture with Presley and his girlfriend, Charlotte D'Alessio, mid-inking.

Far from being annoyed at their son's inking, Kaia parents Cindy Crawford and Rande Gerber revealed they loved the new tat.

'RG + JG APPROVED!' the proud dad wrote on the snap of the inking on Presley's Instagram. Meanwhile, '90s supermodel Crawford added: 'Cool.'

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Refraining from getting an inking herself (tattoos are illegal for anyone under the age of 18 in NYC), Kaia has opened up about her love for her brother on several occasions in the past.

In an interview with People last May, the star said: 'I love working with him and every time we book a job together I get excited.

'At first when we were starting out, we used to shoot a lot together and we would just be there for each other, which is important, especially just starting in such a scary industry — to have someone there that you're comfortable with.'

I'm sure a hug would've gone down just as good, Presley.