A 20-year-old Australian made $1.4 million in just two years after building his own sports jersey business.

Shakir Hammadi is the founder and CEO of Jersey Nation, a sportswear store that sells American-style sporting jerseys referencing pop culture, TV shows, and movies, including a hockey jersey inspired by Adam Sandler's character in Happy Gilmore. 

The young entrepreneur, from Mermaid Beach on the Gold Coast, started Jersey Nation at the age of 18, while in his last year of school at Benowa State High School.

Shak explained he used the money he saved from an after-school job to start his business and did so without the help of his parents.

'I worked at Coles [supermarket] for around a year and saved up as much as I could,' Shak told 9News Gold Coast.

'All that money went straight into it [Jersey Nation]. No help from my parents.'

Shak did not tell his parents about Jersey Nation until he dropped out of his university degree to focus on his business full-time.

His plan paid off, as Jersey Nation reached an impressive one million sales in its first year of operation. 

His campaign even caught the attention of popular YouTubers, athletes, influencers and celebrities including Pete Davidson.

Jersey Nation has amassed a whopping 107.2k followers on TikTok and over 785k followers on Instagram. 

'It's pretty awesome, just seeing people that I looked up to as a kid wearing my stuff,' Shak said. 

Shak said sales in the last financial year are 'looking good', as his business continues to grow in popularity.  

'We did around $1.4million and this year I still have to go through the numbers but, yeah, it's looking good,' Shak said. 

This year, the business expanded even further, allowing customers to fully customise their own jerseys and shorts. 

The young entrepreneur has big aspirations for his company and wants to expand to providing jerseys to Australia's sporting teams.

'I'm trying to expand into providing jerseys for sports teams and non-profit organisations, that's the goal right now,' Shak said.