In an exclusive interview with E! News’ Francesca Amiker at the Kentucky Derby, Tina Knowles expressed her immense pride in Beyoncé and Jay-Z’s 6-year-old twins, Rumi and Sir. The 70-year-old grandmother couldn’t contain her joy, especially as Rumi made history as the youngest woman to chart on the Billboard Hot 100 for her feature on Beyoncé’s track “Protector” from the Cowboy Carter album. Tina Knowles was visibly elated at her granddaughter’s accomplishment, showcasing the family’s legacy in the music industry.