Spoiler: How far did our Project Runway designer go?

Sean Kelly will compete on the 13th season of Project Runway.

Kiwi fashion designer Sean Kelly has won the reality TV show Project Runway in New York.

Originally from Hawera, Kelly, 25, designed a collection called "Betrayal of Caesar" which appeared at New York Fashion Week.

He is the first New Zealander chosen to compete in the New-York based fashion show, hosted by international model Heidi Klum.

Minutes before learning he had won, Kelly told the judges he wanted his collection to "feel luxurious".

Kelly was a favourite throughout the series, enjoying three wins where designers had to complete looks in a limited time.

One of his wins was for best design on episode five and the show's co-presenter, Heidi Klum, wore the dress to the Creative Arts Emmy awards on August 16.

Heidi Klum wears Sean Kelly's design at Creative Arts Emmy awards in Los Angeles.

Kelly received a prize pack receiving $100,000 from Red Robin to launch his business, a car from Lexus and a spread in Marie Claire magazine.