CLEVELAND — In an election year when Hillary Clinton is depending on young black voters to turn out, she may have gotten her biggest boost yet here on Friday.

Some of the most famous names in hip-hop came out to rally votes for her at an event that featured Beyoncé, Jay Z and Chance the Rapper, all of whom implored thousands of cheering people to back the Democratic presidential nominee.

“Hello, Cleveland!” Mrs. Clinton said as she stood onstage with Beyoncé and Jay Z.

Mrs. Clinton called Beyoncé “a woman who is an inspiration to so many others” and thanked Jay Z “for addressing in his music some of our biggest challenges in the country: poverty, racism, the urgent need for criminal justice reform.”

“When I see them here, this passion and energy and intensity, I don’t even know where to begin because this is what America is, my friends,” she said.