This is Solange's first time in the top slot, and also makes her and Beyonce the first sisters to have both scored No. 1 albums. The only other siblings to have achieved such success are Michael and Janet Jackson, as well as Master P and his brother, Silkk the Shocker.
Like the Jackson siblings did in 2001 with their albums Invincible and All For You, Solange and Beyonce both nabbed the No. 1 spot in the same calendar year.
Beyonce has six No. 1s, including this year's Lemonade album, while the late King of Pop also racked up six No 1s, including Thriller in 1983 and This Is It soundtrack in 2009. Meanwhile, Janet has seven No. 1s, starting with her 1986 album, Control.
Solange's A Seat at the Table has been met with much critical acclaim -- with stars including Lena Dunham, Calvin Harris and Rashida Jones praising the album -- and Beyonce is clearly her sister's biggest fan. "Congrats to my sister on creating this beautiful work of art," she Instagrammed. "I could not be more proud of you @saintrecords."