The 29-year-old PSG star used to play for Barnabeu from 2011 to 2015 before moving to PSG.
Di Maria and Messi are international team-mates and used to play together for Argentina.
Sergio Busquets, Jordi Alba, Carles Puyol,Cesc Fabregas, Xavi and Samuel Eto’o have touched down at Argentina for the wedding with their partners.
Messi’s Argentinean team – mate Sergio Aguero’s wife, Karina will perform the song for the first dance at the wedding ceremony.
Luis Enrique, who guided the Catalan side to two La Liga triumphs and a Champions League title during his three-year reign at Barcelona, has not been invited at the wedding event.
But club staff including physiotherapists, masseurs, medics and first-team doctors has been invited.
Barca skipper Iniesta has informed beforehand that he would not be able to attend the event.
Leo and his fiancé Antonella will stay at at the luxurious City Centre Casino- hotel complex along with their two kids Thiago and Mateo.
It is expected that the wedding will take place in the same venue as the guests will also be staying there.