The 18-year-old joins from English Premier League side Watford.
The Scottish international, who arrived at the Emirates from Celtic in 2019 in a move worth around £25million, has put pen to paper on a five-year deal to keep him in north London until 2026.
Steven Gerrard has claimed the first major league title of his managerial career, with Rangers now holding an unassailable 20-point lead in the league table.
The attacker had been watched by both sides of the Glasgow divide with pre-contracts being considered by both outfits.
The striker is currently on loan at German Bundesliga side Union Berlin and a number of clubs, including the Hoops, are aware of his availability in the January window.
Gerrard is looking to guide his side to a 19-point lead over their bitter rivals.
The 22-year-old attracted interest from clubs in the summer after an impressive campaign last season and he is now on Celtic’s radar.
But the Italians had to withstand a late barrage from the Scottish champions to secure the three points.
The group stages get underway on October 19, with six rounds of group games running through to mid-December
The 20-year-old Dubliner joined Celtic from Southampton in 2019 but has yet to play a competitive fixture for the Hoops.
The Dens Park side have already completed the signing of Nicholas Hamilton but want to further bolster their attacking options.
The former African Champions will filed out against Ivory Coast on October 10, while they battle Tunisia three days later at the same venue
Either Djurgarden or Ferencvaros, champions of Sweden and Hungary respectively, will visit Celtic Park on August 25 or 26, assuming Neil Lennon’s men can first overcome KR Reykjavik the week before.
The 41-year-old replaces Damien Duff, who left to take up a role with the Republic of Ireland.
Heerenveen picked up the winger last summer from Valerenga, despite interest from Celtic, Lazio and Besiktas.
Rodgers is the second manager to confirm he had a positive test for COVID-19 after Arsenal manager Mikel Arteta
Celtic have been declared 2019/2020 Scottish champions for a record-equalling ninth successive season by the Scottish Professional Football League, while Hearts were relegated.
Neil Lennon’s side were 13 points clear at the top of the table with eight games remaining when the league was postponed on March 13, prior to the Hoops’ derby visit to Ibrox.
Former Nigerian international, Efe Ambrose, has joined Livingston on an 18-month contract.
Efe Ambrose is on the verge of returning to Scottish Football after it was reported that the Nigerian defender had held discussions with Livingston about a potential move to West Lothian.