14-year-old Kylie took to the catwalk for the very first time at Avril Lavigne's Abbey Dawn exhibition at the Metropolitan Pavilion.
Kylie's brother Brody and sisters Kourtney, Kendall, Kim and her husband Kris Humphries were in attendance at the Abbey Dawn show to support her.
Kim later praised Kylie on Twitter, writing: "Just left @AvrilLavigne's fashion show w my lil sis @KylieJenner walking in it! She was so fab! (sic)"
Kylie also tweeted that she enjoyed walking the runway, saying: "Wow..had the most amazing time!!!"
The teenager has previously modelled in print campaigns for Paper magazine and Sears.
Kylie's sister Kim recently suggested that she's interested in launching her own make-up line.
> Kim Kardashian 'helps sisters model'
> Kylie, Kendall Jenner cover Katy Perry's 'Firework' - Watch