The Aristocows were Williams' Disney a cappella group. Their repertoire consisted entirely of Disney songs. This was usually limited to songs featured in Disney films, but songs featured in other Disney media, such as Simple and Clean from the video game Kingdom Hearts, were also utilized.
The co-ed group was conceived in spring 2010 by Rachel Durrant '13 and held its first concert in spring 2011. The Aristocows was the only Williams a cappella group that did not hold auditions for membership. Instead, any member of the student body was welcome to join, regardless of singing ability, provided they committed to the group. As a result, the group was the largest a cappella group during its early history.
The Aristocows held only one concert per semester, but were known for performing at other events, often unannounced. First and foremost, their goal was to have fun. During Winter Study 2012, they played a Star Wars-related take of Humans vs. Zombies called Jedi vs. Sith, devised and moderated by Allan Gonzalez '12, in order to further group bonding. Hence, they ran around campus with lightsabers for a month.
After much of the leadership graduated or went abroad after the 2023-24 academic year, the Aristocows were placed on hiatus with no return date.