Beyoncé is related to the royal family. More specifically, she is reportedly 25th cousins, once removed, with Queen Elizabeth II.
This connection was discovered by FindMyPast.com, which traced Beyoncé's ancestry through Louisiana and Acadia, ultimately finding a common ancestor with the British monarch: King Henry II. He was Queen Elizabeth II's 24th great-grandfather.
Therefore, while not a direct or close relationship, Beyoncé does indeed share a distant lineage with the British royal family.