Joe Jonas has been supporting Prince William on his latest royal engagement in Botswana.
The Prince met with school children to learn about Coach For Conservation - a project that teaches self-respect, environmental awareness and how to use football to relate to animals in the wild.
US singing sensation Joe, who is one third of the Jonas Brothers with his two siblings, is in Botswana for his own charity work but stopped by to perform for the children Prince William was working with.
Prince Harry is also in southern Africa for is own charity work but the two brothers will take a break to support England when they play Algeria in the World Cup on Friday.
William will also be promoting the Football Association's bid for England to host the 2018 World Cup, something FIFA officials are unsure of.
But Joe Jonas thinks the Prince can do it: "He won me over so yeah, definitely," the singer said.