Prince William and Prince George, 10, supported the Welsh rugby team in the World Cup quarterfinals in France over the weekend.
The father-son duo wore matching outfits as they watched Wales take on Argentina at the Stade de Marseille.
Prince George and Prince William at the Rugby World Cup.
As patron of the Welsh Rugby Union, Prince William has attended several Rugby World Cup matches to cheer on the Welsh team. This was the first time Prince George joined his father at the prestigious tournament.
The two royals wore navy blue suits with red ties, coordinating their looks as they watched the match from the stands.
In September, Prince William also watched Wales compete in the group stage of the World Cup.
William took the title of Prince of Wales following the death of Queen Elizabeth in September. His position requires him to support several UK national teams.
Meanwhile, Kate Middleton was absent from the Wales match because she supports the opposition, England, as patron saint of English rugby.
This Sunday, the Princess of Wales will attend the match between England and Fiji in France.
Beyond rugby, Prince William is president of the English Football Association. He has shared his diplomatic approach to supporting both English and Welsh soccer.
As heir to the throne, Prince George is gaining first-hand experience accompanying his father to major sporting events such as the Rugby World Cup.