Tennis star Serena Williams joined her good friend Beyonce on stage during her performance of "Sorry" on the last night of the Formation tour in East Rutherford.
Serena teased her appearance on Twitter earlier in the day.
Watch Serena William and Beyonce below:
Williams was featured in Beyonce's music video for the song "Lemonade."
Williams has previously shared photos of her and the music star together on Instagram.
Beyonce was also in attendance for Williams' previous matches at the U.S. Open and Wimbledon.