Beyonce is co-founder, with actress-producer Salma Hayek Pinault and Gucci creative director Frida Giannini, of the charity, which supports projects improving access to education, health care and justice for women.
Partner organizations include UNICEF, the Global Fund for Women and Plan International.
Giannini said she was grateful for Prince Harry’s involvement, because “it’s very important in projects like that, talking about women that some very strong male personalities are with us.”
Hayek Pinault said Beyonce was the best possible ambassador for the cause.
“Do you know that everybody in her band is a girl?” she said. “I mean talk about woman power.”