The 30-year-old married childhood sweetheart Antonella Roccuzzo in Rosario, the city of his birth, on Friday - and the ceremony was attended by some of football's biggest names.
Jordi Alba, Carles Puyol, Cesc Fabregas, Xavi, and Samuel Eto'o are also attending.
The menu had typical Argentine elements and included beef fillet and bom bom sausages, washed down with champagne and fine wines.
Messi met Roccuzzo, who is also from Rosario, when they were growing up.
He moved to Spain when he was 13 to join FC Barcelona, but kept in touch with Rocuzzo.
The five-time Ballon d'Or-winning groom had 54 goals this season in 52 games for Barca. He is widely regarded as the world's best footballer.
Instead of wedding presents, the couple asked for donations to a children's charity.
Despite generally being considered a humble legend-in-the-making, Lionel Messi is low-key a flashy kind of dude.
While playing for Newell's Old Boys as kids, so the story goes, Scaglia and Messi became friends off the pitch.
Although there were reportedly more than 150 journalists at Rosario's City Center Complex, the ceremony itself appears to have been private.
Some friends of Ms Roccuzzo have shared pictures of her relaxing with relatives.
"I congratulate Messi; he knows how much I love him", Maradona said, as reported by Goal.