Second born son and child of international soccer superstar Lionel Messi and his longtime girlfriend and partner, model Antonella Roccuzzo. Lionel's brother Matias broke the news of the arrival of Mateo via Twitter. His mother shared a photo of him gripping her finger via Instagram the day after his birth. His father returned from the US to Spain to be with him when he was born. His parents have known each other since they were five years old but have been officially together since 2008. His older brother is Thiago Messi. ^[1]