2 Milly is the stage name of a hip-hop artist and dancer known for his viral dance move called the "Milly Rock." He gained popularity in the mid-2010s, particularly through social media platforms like Instagram and YouTube, where users showcased their own versions of the dance. The song "Milly Rock" was released in 2014 and became a significant hit, contributing to the dance's widespread recognition. 2 Milly has since collaborated with various artists and continues to influence the dance and music scene, particularly in the realm of hip-hop.