Halloran, 26, returns to the A-League after five years abroad which has seen him playing in Germany and Japan since leaving Brisbane Roar in 2013.

He has six caps for the Socceroos and made his World Cup debut in the 2014 World Cup in Brazil when he came off the bench against Chile and also played against both Holland and Spain.

He last played for V-Varen Nagasaki in the J1 League, signing for the club in January after leaving 2. Bundesliga side FC Hendenheim.

He's a been a free agent since leaving Nagasaki after five games in July, but was today unveiled as Adelaide's latest signing.

“It feels great to be joining Adelaide United,” Halloran said today. “I’m keen to be back in the A-League and the Aussie camaraderie and mateship that’s within an Aussie team is very unique.

“I’m looking forward to being part of that again.

“Coming back to Australia I’d have to say I’m a more well-rounded footballer and playing in Germany and playing in Japan they’re both quite high levels, which helps a lot.

“To date, I’m yet to win any silverware so I definitely have ambitions of coming to Adelaide to win something and to win the FFA Cup would be a great start.

“I obviously want to be as successful as I can in the A-League as well and that would mean winning the Championship.”

Reds Head Coach Marco Kurz hailed Halloran's quality.

“I am very happy that we have been able to sign Ben for the next two seasons,” Kurz said. “He is a very versatile attacking player that will be important for us in the new season.

“He knows the A-League from playing here for a few seasons when he was younger, and was then able to head overseas and play football in Germany and also Japan.

“Ben was also part of the Socceroos team in the 2014 World Cup and these experiences have definitely helped him develop into a quality footballer.

“We’re excited to see what Ben will bring to our team and I’m confident he will be another good fit.”