Cristiano Ronaldo's son, Matteo, was pictured wearing a Barcelona kit in a social media post made by his mother.
Ronaldo spent almost a decade with Real Madrid, Barcelona's fiercest rivals in Laliga and became one of the club's greatest players in the process.
The Portuguese star became an enemy of the Catalan giants during his time in the Spanish capital but his son Mateo was filmed sporting their top.
A video shared by Georgina Rodriguez shows Mateo, 5, and his siblings Alana Martina and Eva doing a choreographed dance in their living room, captioned with a laughing and heart emojis.
During his nine-year stay at Real Madrid, Ronaldo scored 451 goals in 438 appearances, including 20 in 34 games against Barca.
He also won multiples honours including four Champions League titles, four LaLigas and three Club World Cups.
The 38-year-old currently plays for Saudi club Al Nassr following his release from Manchester United after falling out with the club.
Ronaldo scored a second-half penalty as Al Nassr beat Al Ta'ee in midweek to narrow the gap on leaders Al-ittihad to three points with three games to go.