Lamine Yamal helped Spain win the 2026 World Cup, beating Argentina 1-0, but it was his three-year-old brother Keyne whose exuberant sideline celebrations went viral and captured widespread public attention. The win made the 19-year-old the youngest player ever to win both the European Championship and the World Cup, while Keyne, a regular fixture in his brother's social media posts, was hailed by fans as one of the tournament's unexpected breakout stars.

Spain secured victory with a goal in the 106th minute at the New York New Jersey Stadium, and Yamal also faced Lionel Messi for the first time in a World Cup final, nearly two decades after Messi was pictured cradling him as a baby in 2007. Yamal, the son of Sheila Ebana, has spoken warmly of his bond with Keyne, saying his brother "means everything" to him, while Messi praised Yamal beforehand as "a tremendous player" and "a global star".