The transfer fee is a club record for Sunderland, with an initial 33 million Euros (£27.8m) and a potential 5 million Euros (£4.2m) in add-ons, plus a 15 per cent sell-on clause.
Kristjaan Speakman, Sunderland's sporting director, acknowledged Bellingham's impact and wished him well, despite the club's disappointment in losing him.
Jobe Bellingham expressed his gratitude to Sunderland's supporters and staff, highlighting the strong bond he developed with the club and its fans during his two years there.