AFP / GETTY *Lionel Messi joined on the pitch by Antonela Roccuzzo and their two sons
Football stars and celebrities have been arriving in Argentine's city of Rosario for the wedding of football superstar Lionel Messi.
Hundreds of police have been deployed ahead of the event, which will take place shortly at a luxury hotel.
Messi, the Argentina and Barcelona player, is marrying his childhood sweetheart Antonela Roccuzzo in his hometown.
They met there before he moved to Spain aged just 13.
Argentina's Clarín newspaper has variously called Friday's wedding "the wedding of the year" and "the wedding of the century".
Messi's Barcelona teammates, including Luis Suárez and Neymar, will be among 260 guests at Friday's ceremony, it said.
Many have already flown in on private jets.
AFP*Gerard Piqué (left) and his wife Shakira posed for a picture with airport staff as they arrived in Rosario
People have been gathering at the local airport to try to spot some of the famous guests.
Extra police officers have been drafted in to ensure security around the hotel. A private security firm is working inside to keep out potential gatecrashers.
About 150 journalists have received accreditation to enter a special press area, but will not have full access to the venue, said organisers.
AFP / GETTY *ImageArtist Lisandro Urteaga paints a celebratory a mural of Messi on a wall in Rosario ahead of the wedding
Messi, 30, met his future wife when he was just five years old. Antonela Roccuzzo, 29, is the cousin of his best friend, Lucas Scaglia, who also became a professional football player.
Messi accepted an offer to play for Barcelona when he was 13, on condition that they pay for treatment for his growth hormone deficiency.
He has spoken about the difficulties he faced on leaving behind his loved ones and former club.
The couple, who now live in Barcelona, have two sons together.
In May, his appeal against a 21-month jail term for tax evasion in Spain was rejected. He is unlikely to go to prison as the sentence can be served under probation or possibly avoided by paying a fine.
The event will take place at Rosario's City Center hotel complex, which has an adjoining casino.
CITYCENTER ROSARI*Rosario's Hotel CityCenter set up for a previous event
Ms Roccuzzo, 29, is expected to wear a dress by Rosa Clara, a Barcelona-based designer who has dressed actress Eva Longoria and Spain's Queen Letizia.
Aside from a "sushi station", the menu is a very Argentine affair, including empanadas (traditional pasties) and all parts of the cow, from a casserole of sweetbreads to blood sausage.
Messi has invited the Barcelona squad, including Neymar, Luis Suárez and Gerard Piqué, who arrived in Rosario in a private jet with his wife, Colombian pop-star Shakira.
Teammates from Argentina's national team, including Sergio Agüero, will also be present.
Clarín reported that he has not invited any of his recent coaches, including Pep Guardiola, who is now at Manchester City.
Argentina's other big football legend, Diego Maradona, is also not on the list, according to the local press.
AFP / GETTY IMAGES*Uruguayan footballer Luis Suárez touches down in Rosario for his teammate's big day
The port city of Rosario sits on the banks of the Paraná, about 300km north-west of Buenos Aires in the centre of the country.
Another famous Argentine to have spent his early years here is Ernesto "Che" Guevara.
Messi is known locally simply as Lío.
AFP*A mural of Che Guevara next to the Newell's Old Boys club logo
He has been a local hero since his days as a star player for Newell's Old Boys.
The team has a staunch rivalry with nearby Rosario Central, similar to that of Boca Juniors and River Plate in Buenos Aires.
Since moving to Spain, Messi has won a record-breaking five Fifa Ballon d'Or awards.