The five-time Ballon d’Or winner has responded to speculation over his future by committing the next four seasons to the Catalan club.
Once complete, the new deal, which feature a staggering €700m (£626m) release clause, will mean Lionel Messi will have spent 17 years in the Barcelona first team.
Since joining the club at 13, Messi has helped Barcelona to eight Spanish league titles and won the Champions League four times.
Messi won the European Golden Shoe for the fourth time by scoring 37 goals in the Spanish league last seasonp
Throughout his career at Barça, the 30-year-old has scored 523 goals in 602 games and is both the Club’s and La Liga’s all-time leading goalscorer.