The former Arsenal and Liverpool star’s partner, Little Mix singer Perrie Edwards, had gone public on social media about her desire for an extended stay with Celtic in Scotland and the player himself expressed his delight about his new deal on the club website.

“It was an incredible time last season and to be part of that success in winning the league and Scottish Cup was so special,” said Oxlade-Chamberlain, who won 35 caps for his country.

“I’m really excited to be back and I’m looking forward to meeting up with the boys and getting to work ahead of what will hopefully be another successful season.”

O’Neill’s squad head out to Ireland this weekend before their first pre-season match against Shelbourne on Tuesday.

Oxlade-Chamberlain, who started his career at Southampton and won the Premier League, Champions League and Fifa Club World Cup with Liverpool, will join Celtic at their training camp in Portugal.

Celtic have yet to make any new signings this summer.