The official announcement marks the end of a protracted transfer saga that has been ongoing since it began in June.
Olise will serve as an integral part of new boss Vincent Kompany’s plans as he looks to overhaul the side that finished second behind Bayer Leverkusen last season, ending a run of 11 consecutive Bundesliga titles.
Bayern are said to have paid £52m to secure the France youth international’s services.
In a video shared on the club’s social media, the 22-year-old donned the Bavarian side’s famous red shirt.
In an interview with the club’s website, Olise insisted he is determined to prove himself in the Bundesliga and win as many titles as possible.
‘The talks with FC Bayern were very positive, and I’m very happy to now be playing for such a big club.’ Olise said.
