Leckie has signed a two year deal with The Reds, the Melbourne born winger a current member of the Qantas Next Young Socceroos (U/19) having recently competed in the ASEAN Football Federation (AFF) Under-19 Championships in Thailand alongside young United goalkeeper Mark Birighitti.

Adelaide United Coach Aurelio Vidmar says Leckie's signing adds to an already promising crop of young talent at the club, who all have the ability to develop into stars of the future.

"He (Leckie) is an attacking wide midfielder, either the left or right hand side and he's extremely quick," Vidmar said. "At this stage he's probably not technically in the right space but certainly that's something we can work on, but he knows one thing and that's how to get in front of goals.

"He's part of that under 23 group, with Joe Costa and Francesco Monterosso, that we've got time to work with and hopefully he's a good prospect for our future."

Having only arrived in Adelaide yesterday, Leckie has not had long to get to know his new team mates, but despite being the new kid on the block, he has been included in a squad of 17 heading over to New Zealand to take on  Wellington Phoenix on Friday night.

Securing his first professional contract, Leckie says he is delighted to have signed with Adelaide United and is hopeful of getting the chance to show the club what he can do on the field.

"It's great to join Adelaide United and hopefully I can do well here," Leckie said. "I've got some speed but I'll just see how I go and hopefully I can just help out the boys.

"This is all pretty new to me so I'll just take it a step at a time and hopefully I can get into the side at some stage."

Leckie, who becomes United's 22nd player on its roster for the season, will have big shoes to fill after being given the number 19 shirt, the number previously worn by imposing defender Sasa Ognenovski and United's inaugural marquee signing, Chinese striker Shengqing Qu.