Beast (/ˈbiːst/; Korean: 비스트; stylized as BEAST or B2ST) is a six-member boy band from South Korea, formed in 2009 by Cube Entertainment. The band's members are Yoon Doo-joon, Jang Hyun-seung, Yong Jun-hyung, Yang Yo-seob, Lee Gi-kwang, and Son Dong-woon.

Beast has released two Korean full-length album, six Korean mini-albums, one Japanese full-length and various singles. The group's debut release was in October 2009, when their first mini-album, Beast Is the B2ST, was made available. They then released their first full-length album, Fiction and Fact, in 2011, receiving their first triple crown on M.net's M! Countdown for their lead single Fiction. In the same year, Beast made their Japanese debut with the release of the single, Shock (Japanese Version).